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California, USA

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List of Mining Districts - Southern California

California, USA
List of Mining Districts - Northern California

California, USA
List of Mining Districts - Southern California

California, USA
List of Mining Districts - Northern California

California, USA
List of Mining Districts - Southern California

California, USA
List of Mining Districts - Northern California

California, USA
 


Detailed Mineral List:
Acanthite
Formula: Ag2S
Localities: Reported from at least 91 localities in this region.
Photo: © Brent Thorne 2012. Acanthite from Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Localities: Reported from at least 69 localities in this region.
Photo: © 2005 Jake Harper www.earthquestminerals.com USA. Actinolite from New Melones Dam, West Belt, Calaveras Co., California, USA
Actinolite var: Smaragdite
Formula: Ca2(Mg,Fe2+)5Si8O22(OH)2
Locality: Marin Co., California, USA
'Actinolite-Tremolite Series'
Locality: Spring Street Quarry (locality 270), Ben Lomond Mountain area, Ben Lomond Mountain, Santa Cruz Mts, Santa Cruz Co., California, USA
Adamite
Formula: Zn2(AsO4)(OH)
Localities: Santa Cruz Co., California, USA
Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
Chloride Cliff Mine, Chloride Cliff, Chloride City, Chloride Cliff District (South Bullfrog District), Funeral Mts (Funeral Range), Amargosa Range, Inyo Co., California, USA
Zinc Hill Mine (Utacaia group; Colorado group; Darwin Zinc prospect), Zinc Hill, Zinc Hill District, Argus Mts (Argus Range), Inyo Co., California, USA
Photo: © Doug Merson 2006. Adamite from Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
Adamite var: Cuprian Adamite
Formula: (Zn,Cu)2AsO4OH
Localities: Zinc Hill Mine (Utacaia group; Colorado group; Darwin Zinc prospect), Zinc Hill, Zinc Hill District, Argus Mts (Argus Range), Inyo Co., California, USA
Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Photo: © R.D.Green. Cuprian Adamite from Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
Aegirine
Formula: NaFe3+Si2O6
Localities: Reported from at least 15 localities in this region.
Photo: © Len Pisciotta 2008. Aegirine from California State Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Aegirine var: Vanadian Aegirine
Formula: Na(Fe,V)Si2O6
Locality: Laytonville Quarry (Longvale; Longvale Quarry), Laytonville, Coastal Range, Mendocino Co., California, USA
Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Locality: Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Aenigmatite
Formula: Na2Fe2+5Ti(Si6O18)O2
Localities: Aenigmatite occurrences, Santa Rosa, Sonoma Co., California, USA
Aenigmatite occurrence (1), Aenigmatite occurrences, Santa Rosa, Sonoma Co., California, USA
Aenigmatite occurrence (2), Aenigmatite occurrences, Santa Rosa, Sonoma Co., California, USA
Afwillite
Formula: Ca3(HSiO4)2 · 2H2O
Locality: Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Photo: © Doug Merson 2006. Afwillite from Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Agaite (TL)
Formula: Pb3CuTeO5(OH)2(CO3)
Type Locality: Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Habit: Elongated orthorhombic crystal.
Colour: Blue
Reference: Kampf, A.R., Mills, S.J., Housley, R.M., Marty, J. (2013): Lead-tellurium oxysalts from Otto Mountain near Baker, California: IX. Agaite, Pb3Cu2+Te6+O5(OH)2(CO3), a new mineral with CuO5-TeO6 polyhedral sheets. American Mineralogist, 98, 512–517
Localities: Recorded from at least 1 other locality in this region.
Photo: © Chuck Adan 2017. Agaite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Agardite-(La)
Formula: LaCu6(AsO4)3(OH)6 · 3H2O
Locality: Perovskite Peak (Perovskite Hill), Santa Rita Peak, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Agardite-(Y)
Formula: YCu6(AsO4)3(OH)6 · 3H2O
Localities: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Chlorite Schist Knob area, South of the Dallas Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
'Agglomerate'
Localities: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Stewart Mine (Juarez Mine; Stewart Manganese Mines), Havasu Palms (Roads End Camp), Whipple District (Monumental District), Whipple Mts, San Bernardino Co., California, USA
Aguilarite
Formula: Ag4SeS
Locality: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Aikinite
Formula: PbCuBiS3
Locality: Murdock Mine [2] (Plumas Jumbo Mine), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Åkermanite
Formula: Ca2Mg(Si2O7)
Locality: Crestmore, Riverside Co., California, USA
Alabandite
Formula: MnS
Localities: Alum Rock Park, East Foothills, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
San Diego Co., California, USA
'Alaskite'
Localities: Galway Lake Mine (Unnamed mine), Argos Mountain, Lava Beds District (Newberry District), Lava Bed Mts, San Bernardino Co., California, USA
Unnamed Au-Cu mine [23] (Unnamed prospect; Gold-Copper occurrence), Vontrigger Hills, Signal District (Vontrigger District; Hackberry Mountain), San Bernardino Co., California, USA
Unnamed Au-Cu occurrence [36], Vontrigger Hills, Signal District (Vontrigger District; Hackberry Mountain), San Bernardino Co., California, USA
Albite
Formula: Na(AlSi3O8)
Localities: Reported from at least 224 localities in this region.
Photo: © 2005 Jake Harperwww.earthquestminerals.com USA. Albite from New Melones Dam, West Belt, Calaveras Co., California, USA
Albite var: Andesine
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Localities: Reported from at least 13 localities in this region.
Photo: © Van King. Andesine from Coyote Range, Bishop, Bishop District, Inyo Co., California, USA
Albite var: Cleavelandite
Formula: Na(AlSi3O8)
Localities: Reported from at least 43 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Cleavelandite from Little Three Mine, Ramona, Ramona District, San Diego Co., California, USA
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Localities: Reported from at least 13 localities in this region.
'Albite-Anorthite Series'
Localities: Reported from at least 25 localities in this region.
Alforsite (TL)
Formula: Ba5(PO4)3Cl
Type Locality: Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 314.
Localities: Recorded from at least 3 other localities in this region.
Photo: © Pavel M. Kartashov collection & photo. Alforsite from Trumbull Peak Ba-silicate deposit, Trumbull Peak, Clearing House, Clearing House District, East Belt, Mariposa Co., California, USA
Allanite-(Ce)
Formula: {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Localities: Reported from at least 11 localities in this region.
Photo: © 2008, JGW. Allanite-(Ce) from Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
'Allanite Group'
Formula: {A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Localities: Reported from at least 24 localities in this region.
Photo: © g.slak 2009. Allanite Group from Pacoima Canyon pegmatite locality, Pacoima Canyon, San Gabriel Mts, Los Angeles Co., California, USA
Allanite-(La)
Formula: {CaLa}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Locality: Unnamed Allanite occurrence [1], Ragged Peak, Tuolumne Co., California, USA
Alleghanyite
Formula: Mn2+5(SiO4)2(OH)2
Localities: Alum Rock Park, East Foothills, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
Lubanko prospect, Fiddletown (Oleta), Fiddletown District (Oleta District), Amador Co., California, USA
Germolis prospect (Rodon; Rodonick; Germolie; Cormolis), Fiddletown (Oleta), Fiddletown District (Oleta District), Amador Co., California, USA
Allophane
Formula: (Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Localities: Johannesburg area, Johannesburg District, San Bernardino Co., California, USA
Unspecified Allophane occurrence, Arroyo Grande, Santa Lucia Mts (Santa Lucia Range), San Luis Obispo Co., California, USA
California Rand No. 2 Mine (California Rand Silver Mine; California Rand Mine; Kelly Mine; Kelly Rand Mine), Red Mountain [town] (Osdick), Rand District (Randsburg District), San Bernardino Co., California, USA
Reward Mine (Brown Monster Mine; Ruth; Hirsch and Telescope group; Brown Monster-Reward; Graham-Jones; Eclipse; Golden West claims; Hidden Treasure group; F. D. Roosevelt claims), Reward, Russ District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Photo: Allophane from Reward Mine, Reward, Russ District, Inyo Mts, Inyo Co., California, USA
'Alluvium'
Localities: Reported from at least 24 localities in this region.
Almandine
Formula: Fe2+3Al2(SiO4)3
Localities: Reported from at least 54 localities in this region.
Photo: © Van King. Almandine from Bluebird Kyanite Mine, Vitrefrax Hill, Obregon, Cargo Muchacho District, Cargo Muchacho Mts, Imperial Co., California, USA
'Almandine-Pyrope Series'
Localities: Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Henry W. Coe State Park, Diablo Range, Santa Clara Co., California, USA
Photo: © Harris E. Mason. Almandine-Pyrope Series from Henry W. Coe State Park, Diablo Range, Santa Clara Co., California, USA
'Almandine-Spessartine Series'
Localities: Reported from at least 21 localities in this region.
Photo: © g.slak 2008. Almandine-Spessartine Series from Blue Lady Mine, Chihuahua Valley, Warner Springs District, San Diego Co., California, USA
Altaite
Formula: PbTe
Localities: Reported from at least 19 localities in this region.
Photo: © Rock Currier. Altaite from Browns Flat, Bald Mountain, Calaveras Co., California, USA
Aluminocopiapite
Formula: Al2/3Fe3+4(SO4)6(OH)2 · 20H2O
Localities: Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 and 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA
Island Mountain Mine (Dahrman group; Island Mountain Consolidated Mine; Annex; Leach; Merritt Gore; Shotgun), Moose Peak, Island Mountain, Coastal Range, Trinity Co., California, USA
El Capitan Quarry, Lakeside, San Diego Co., California, USA
Richmond ore body, Iron Mountain Mine (Number 8; Confidence; Old Mine), Iron Mountain, Iron Mountain [town], West Shasta Copper - Zinc District, Klamath Mts, Shasta Co., California, USA
Photo: Aluminocopiapite from Champion Mine, White Mountain Peak, White Mts, Mono Co., California, USA
Alum-(K)
Formula: KAl(SO4)2 · 12H2O
Localities: Nortonville Mine, Nortonville, Black Diamond Mines Regional Preserve, Contra Costa Co., California, USA
Sulphur Bank Mine (Sulfur Bank Mine; Sulphur Bank deposits), Clear Lake Oaks, Sulphur Creek District (Sulfur Creek District; Wilbur Springs District), Lake Co., California, USA
Sulphur Hole (Sulfur Hole; Sulphur pit), Calico, Calico District (Daggett District; Calico-Daggett area), Calico Mts (Calico Hills), San Bernardino Co., California, USA
Ready Relief Mine (Redman Mine; Bailey Brothers Mine), Banner, Banner District, San Diego Co., California, USA
The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Alumohydrocalcite
Formula: CaAl2(CO3)2(OH)4 · 4H2O
Localities: East Mount Hamilton area, Mount Hamilton, Diablo Range, Santa Clara Co., California, USA
Paradise Flat, Rooster Comb, Orestimba District, Diablo Range, Stanislaus Co., California, USA
Alumohydrocalcite var: Chromian Alumohydrocalcite
Formula: CaAl2(CO3)2(OH)4 · 4H2O
Localities: East Mount Hamilton area, Mount Hamilton, Diablo Range, Santa Clara Co., California, USA
Paradise Flat, Rooster Comb, Orestimba District, Diablo Range, Stanislaus Co., California, USA
Alunite
Formula: KAl3(SO4)2(OH)6
Localities: Reported from at least 27 localities in this region.
Photo: © Christophe Boutry. Alunite from Middle Butte Mine, Middle Buttes deposit, Middle Butte, Rosamond, Mojave-Rosamond District, Kern Co., California, USA
Alunogen
Formula: Al2(SO4)3 · 17H2O
Localities: Reported from at least 15 localities in this region.
Amarantite
Formula: Fe3+2(SO4)2O · 7H2O
Localities: Santa Maria Mts, Blythe, Riverside Co., California, USA
Blythe, Riverside Co., California, USA
'Amber'
Formula: C10H16O + (H2S)
Locality: Northeast side of Simi Valley, Simi Valley, Ventura Co., California, USA
Amblygonite
Formula: LiAl(PO4)F
Localities: Reported from at least 13 localities in this region.
Photo: © Rruff Project. Amblygonite from Pala District, San Diego Co., California, USA
'Amblygonite-Montebrasite Series'
Localities: Stewart Mine (MS 6162; Stewart Lithia mine), Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Cryo-Genie Mine (Cindy B-Cryogenie claim; Lost Valley Truck Trail prospect), Warner Springs, Warner Springs District, San Diego Co., California, USA
White Queen Mine (Queen mine; White Queen prospect), Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill), Pala, Pala District, San Diego Co., California, USA
Hiriart Mine (MS 5391), Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill), Pala, Pala District, San Diego Co., California, USA
Amesite
Formula: Mg2Al(AlSiO5)(OH)4
Localities: Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
Mines Road cross section, Diablo Range, Santa Clara Co., California, USA
Garzas, Mount Hamilton, Diablo Range, Santa Clara Co., California, USA
Frisco Talc Mine (Frisco Mine; Frisco deposit), Eagle Point, Talc City District, Talc City Hills, Inyo Mts (Inyo Range), Inyo Co., California, USA
Ammonioalunite (TL)
Formula: (NH4)Al3(SO4)2(OH)6
Type Locality: The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Colour: grayish white
Description: Discovered and described by Altaner et al (1988) from a single specimen in the Smithsonian Museum (NMNH 145596)
Reference: American Mineralogist (1988): 73: 145-152.; Dunning, G. S. & Cooper, J. F. (1993): History and minerals of The Geysers Sonoma County, California. Mineralogical Record 24 (5): 339-352
Localities: Recorded from at least 1 other locality in this region.
Ammoniojarosite
Formula: (NH4)Fe3+3(SO4)2(OH)6
Localities: The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Devils Pulpit, The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Sunset Court, Sharon Heights, Menlo Park, San Mateo Co., California, USA
Sulphur Bank Mine (Sulfur Bank Mine; Sulphur Bank deposits), Clear Lake Oaks, Sulphur Creek District (Sulfur Creek District; Wilbur Springs District), Lake Co., California, USA ? (more information)
'Amphibole Asbestos'
Localities: Reported from at least 12 localities in this region.
Amphibole Supergroup
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Localities: Reported from at least 28 localities in this region.
Amphibole Supergroup var: Byssolite
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Locality: Miracle Mountain Mine, Garnet Hill, Calaveras Co., California, USA
Amphibole Supergroup var: Uralite
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Locality: Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
'Amphibolite'
Locality: Pure Quill Mine (Pure Quill deposit; Gold Bar Tungsten; Quill Mine), West Ord Mountain, Ord Mts, Ord District, San Bernardino Co., California, USA
Analcime
Formula: Na(AlSi2O6) · H2O
Localities: Reported from at least 59 localities in this region.
Photo: © Volker Betz (2013). Analcime from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Anandite
Formula: (Ba,K)(Fe2+,Mg)3((Si,Al,Fe)4O10)(S,OH)2
Localities: Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Trumbull Peak Ba-silicate deposit, Trumbull Peak, Clearing House, Clearing House District, East Belt, Mariposa Co., California, USA
Esquire No. 8 claim (Lander's Gillespite locality), Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Photo: © 2007, JGW. Anandite from Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Anapaite
Formula: Ca2Fe2+(PO4)2 · 4H2O
Locality: Lewis Well, Corcoran, Kings Co., California, USA
Anatase
Formula: TiO2
Localities: Reported from at least 14 localities in this region.
Photo: © Dick Dionne. Anatase from Sunny prospect, White Mts, Mono Co., California, USA
Anatase var: Niobian Anatase
Formula: (Ti,Nb)O2
Locality: Unnamed U occurrence, Hector, Cady Mts, San Bernardino Co., California, USA
'Anauxite'
Localities: Reported from at least 12 localities in this region.
'Ancylite'
Locality: Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Andalusite
Formula: Al2(SiO4)O
Localities: Reported from at least 43 localities in this region.
Photo: © Rock Currier. Andalusite from Champion Mine, White Mountain Peak, White Mts, Mono Co., California, USA
Andalusite var: Chiastolite
Formula: Al2(SiO4)O
Localities: Reported from at least 12 localities in this region.
Photo: © 2003 John H. Betts. Chiastolite from Inyo Mts, Mono Co., California, USA
'Andesite'
Localities: Reported from at least 17 localities in this region.
'Andorite'
Formula: AgPbSb3S6
Localities: Darwin District, Darwin Hills, Inyo Co., California, USA
Monitor - Mogul District, Alpine Co., California, USA
Thompson Mine, Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Andradite
Formula: Ca3Fe3+2(SiO4)3
Localities: Reported from at least 49 localities in this region.
Photo: © 2002 John H. Betts. Andradite from Garnet Hill Mine, Garnet Hill, Calaveras Co., California, USA
Andradite var: Demantoid
Formula: Ca3Fe3+2(SiO4)3
Localities: Yellow Cat Mine, New Idria, New Idria District, Diablo Range, San Benito Co., California, USA
Junnila Mine, New Idria District, Diablo Range, San Benito Co., California, USA
Photo: © 2001 John H. Betts. Demantoid from Yellow Cat Mine, New Idria, New Idria District, Diablo Range, San Benito Co., California, USA
Andradite var: Melanite
Formula: Ca3Fe3+2(SiO4)3
Localities: Reported from at least 11 localities in this region.
Photo: © 2004 by Dominik Schläfli. All rights reserved.. Melanite from San Benito Co., California, USA
Andradite var: Topazolite
Formula: Ca3Fe3+2(SiO4)3
Localities: Reported from at least 6 localities in this region.
Photo: © Jean-Marc Johannet. Topazolite from Yellow Cat Mine, New Idria, New Idria District, Diablo Range, San Benito Co., California, USA
'Andradite-Grossular Series'
Localities: Reported from at least 7 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Andradite-Grossular Series from Kelso Mine, Lebec, Gorman District, Tehachapi Mts, Kern Co., California, USA
Andychristyite (TL)
Formula: PbCu2+Te6+O5(H2O)
Type Locality: Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Habit: Acicular needles.
Reference: Kampf, A.R., Cooper, M.A., Mills, S.J., Housley, R.M. and Rossman, G.R. (2015) Andychristyite, IMA 2015-024. CNMNC Newsletter No. 26, August 2015, page 943; Mineralogical Magazine, 79, 941-947; Kampf, A.R., Cooper, M.A., Mills, S.J., Housley, R.M., Rossman, G.R. (2016): Lead–tellurium oxysalts from Otto Mountain near Baker, California: XII. Andychristyite, PbCu2+Te6+O5(H2O), a new mineral with HCP stair-step layers. Mineralogical Magazine: 80: 1055–1065
Anglesite
Formula: PbSO4
Localities: Reported from at least 61 localities in this region.
Photo: © Brent Thorne 2010. Anglesite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Anhydrite
Formula: CaSO4
Localities: Reported from at least 25 localities in this region.
Photo: Anhydrite from Fossil Canyon, Mud Hills, Barstow District, San Bernardino Co., California, USA
Anilite
Formula: Cu7S4
Locality: Victor claim (Victor Mine), Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Localities: Reported from at least 85 localities in this region.
Annabergite
Formula: Ni3(AsO4)2 · 8H2O
Localities: Reported from at least 10 localities in this region.
Annabergite var: Magnesian Annabergite
Formula: (Ni,Mg)3(AsO4)2 · 8H2O
Locality: Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
Annite
Formula: KFe2+3(AlSi3O10)(OH)2
Locality: Crescent Copper group (Badger State group; Bald Eagle Mine; Neal group), Midland, Big Maria Mts, Riverside Co., California, USA
Anorthite
Formula: Ca(Al2Si2O8)
Localities: Reported from at least 15 localities in this region.
Photo: Anorthite from Grass Valley District, Nevada Co., California, USA
Anorthite var: Bytownite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Locality: Crestmore quarries, Crestmore, Riverside Co., California, USA
'Anorthosite'
Locality: San Gabriel Anorthosite prospect, Acton, Acton District, San Gabriel Mts, Los Angeles Co., California, USA
Ansermetite
Formula: Mn2+(V2O6) · 4H2O
Locality: Hale Creek Mine, Mad River Rock, Coastal Range, Trinity Co., California, USA
Antarcticite
Formula: CaCl2 · 6H2O
Locality: Bristol Dry Lake pit [1] (National Chloride Co. of America; National Chloride Co. salt evaporator; Hollar Chemical Co.; Saline Products Co.; Bristol Dry Lake), Saltus, San Bernardino Co., California, USA
Photo: © Marek Patúš. Antarcticite from Bristol Dry Lake pit [1], Saltus, San Bernardino Co., California, USA
Anthophyllite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Localities: Reported from at least 19 localities in this region.
Photo: © Rruff Project. Anthophyllite from Winchester Placer, Riverside Co., California, USA
Antigorite
Formula: Mg3(Si2O5)(OH)4
Localities: Reported from at least 33 localities in this region.
Antimony
Formula: Sb
Localities: Reported from at least 10 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Antimony from Tom Moore Mine, Erskine Creek deposits, Lake Isabella (Isabella) [town], Erskine Creek District, Kern Co., California, USA
Antlerite
Formula: Cu3(SO4)(OH)4
Localities: Reported from at least 6 localities in this region.
Photo: © Dan & Diana Weinrich Minerals. Antlerite from Buchanan Mine, Iron Mountain, Daulton, Daulton District, Madera Co., California, USA
'Apatite'
Localities: Reported from at least 91 localities in this region.
Photo: © Dick Dionne. Apatite from Opal Hill Mine, Mule Mts, Riverside Co., California, USA
'Apatite var: Apatized Wood'
Locality: Head of Escarpado Canyon, Cima Hill, Escarpado Canyon, Diablo Range, Fresno Co., California, USA
'Apatite var: Carbonate-rich Apatite'
Localities: Unnamed Apatite occurrence, Indian Creek, Creston, La Panza Mts, San Luis Obispo Co., California, USA
Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
'Apatite var: Collophane'
Localities: Reported from at least 8 localities in this region.
Aphthitalite
Formula: (K,Na)3Na(SO4)2
Localities: Searles Lake, San Bernardino Co., California, USA
Deep Springs Lake (Deep Springs Playa), Deep Springs Valley, Inyo Co., California, USA
Well G.75, Searles Lake, San Bernardino Co., California, USA
Photo: © Rruff Project. Aphthitalite from Searles Lake, San Bernardino Co., California, USA
'Aplitic granite'
Locality: Azurite prospect (Blue Bonnet), Williams Well, San Bernardino Co., California, USA
'Apophyllite'
Localities: Reported from at least 19 localities in this region.
Photo: © 2007 JSS. Apophyllite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Aragonite
Formula: CaCO3
Localities: Reported from at least 85 localities in this region.
Photo: © Rock Currier. Aragonite from Unnamed Aragonite occurrence, Morro Bay, San Luis Obispo Co., California, USA
Aragonite var: Flos Ferri
Formula: CaCO3
Locality: Unnamed cave [1], Murphys, Murphys District (Esmeralda District; Sperry District), East Belt, Calaveras Co., California, USA
'Aragotite' (FRL)
Formula: (C,H)
Type Locality: New Almaden Mine (New Almaden Mines), Almaden Quicksilver County Park, New Almaden, New Almaden District, Santa Cruz Mts, Santa Clara Co., California, USA
Description: Impregnates siliceous dolomite.
Reference: Durand, F.E. (1873), Description of a new mineral from the New Almaden mine: California Academy of Science Proceedings: 4: 218; Hanks, Henry Garber (1884), Fourth report of the State Mineralogist: California Mining Bureau. Report 4, 410 pp.: 289; Hanks, Henry Garber (1905), Notes on “aragotite,” a rare California mineral: Royal Micr. Soc. Jour., 1905: 673-676; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 83.
Localities: Recorded from at least 3 other localities in this region.
Arcanite (TL)
Formula: K2SO4
Type Locality: Santa Ana Mine, Trabuco Canyon, Trabuco Canyon [town], Santa Ana Mts, Orange Co., California, USA
Habit: Pseudo-hexagonal due to twinning.
Description: Found as yellow crystals in a pine railroad tie in Tunnel #1.
Reference: Eakle (1908) Bull. Dept. of Geology, Univ. of California: 5: 232. Frondel, C. (1950) Amer. Min.: 35: 596. Palache et al (1951) Dana's Sys. Min., 7th. ed.: 400.
Localities: Recorded from at least 1 other locality in this region.
Photo: © 2008, JGW. Arcanite from Santa Ana Mine, Trabuco Canyon, Trabuco Canyon [town], Santa Ana Mts, Orange Co., California, USA
Arfvedsonite
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Localities: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Argentojarosite
Formula: AgFe3+3(SO4)2(OH)6
Locality: Cactus Gold Mine (Blue Eagle Mine; Middle Buttes Mine; Cactus Mine; Cactus Queen Mine; Shumake deposit; Shumake Mine), Middle Buttes deposit (Cactus deposit), Middle Butte, Rosamond, Mojave-Rosamond District (Mojave District), Kern Co., California, USA
Aristarainite
Formula: Na2MgB12O20 · 8H2O
Localities: South Meridian claim, Twenty Mule Team Canyon, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
Eagle Borax Spring, Death Valley, Inyo Co., California, USA
Photo: Aristarainite from Eagle Borax Spring, Death Valley, Inyo Co., California, USA
Arsenbrackebuschite
Formula: Pb2Fe3+(AsO4)2(OH)
Locality: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Arsenic
Formula: As
Localities: Reported from at least 6 localities in this region.
Arseniosiderite
Formula: Ca2Fe3+3(AsO4)3O2 · 3H2O
Localities: Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Santa Cruz Co., California, USA
Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
Lee Yim Mine (Lee Yim deposit; Gallinger-Root Mine; Manganese 1-10 claims; Root Mine; Garringer Mine; Barringer Mine; Lavic Mountain Mine), Ludlow (Stagg), San Bernardino Co., California, USA
Photo: Arseniosiderite from Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
Arsenolite
Formula: As2O3
Localities: Exchequer Mine (Buckeye Mine; Acacia Mine; Saugatuck et al), IXL Canyon (I.X.L. Canyon), Silver Mountain, Silver Mountain District, Alpine Co., California, USA
Monitor Mine, Loope (Monitor; Loopeville), Monitor - Mogul District, Alpine Co., California, USA
Amargosa Mine [1], Salt Spring Hills (Salt Hills), San Bernardino Co., California, USA
Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Island Mountain Mine (Dahrman group; Island Mountain Consolidated Mine; Annex; Leach; Merritt Gore; Shotgun), Moose Peak, Island Mountain, Coastal Range, Trinity Co., California, USA
Arsenopyrite
Formula: FeAsS
Localities: Reported from at least 174 localities in this region.
Photo: © SMS 2015. Arsenopyrite from Alleghany, Alleghany District, Sierra Co., California, USA
Arsenopyrite var: Danaite
Formula: (Fe0.90Co0.10)AsS - (Fe0.65Co0.35)AsS
Localities: Unnamed Cu-Au-Zn-As occurrence [1], Summit City, Meadow Lake District, Nevada Co., California, USA
Hauselt prospect (Hauselt patent; Hauselt Mine), Murphys, Murphys District (Esmeralda District; Sperry District), East Belt, Calaveras Co., California, USA
Josephine Mine (Pine Tree Mine; Pine Tree Josephine Mine; Pine Tree and Josephine Mine), Pacific Mining Co. group, Bagby, Bagby-Mariposa-Mount Bullion-Whitlock District, Mother Lode Belt, Mariposa Co., California, USA
Arsentsumebite
Formula: Pb2Cu(AsO4)(SO4)(OH)
Locality: Reward Mine (Brown Monster Mine; Ruth; Hirsch and Telescope group; Brown Monster-Reward; Graham-Jones; Eclipse; Golden West claims; Hidden Treasure group; F. D. Roosevelt claims), Reward, Russ District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Photo: © Michael Cline. Arsentsumebite from Reward Mine, Reward, Russ District, Inyo Mts, Inyo Co., California, USA
Artinite
Formula: Mg2(CO3)(OH)2 · 3H2O
Localities: Reported from at least 12 localities in this region.
Photo: © Bert Hendriksen. Artinite from Artinite pit, Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
'Asbestos'
Localities: Reported from at least 119 localities in this region.
'Asbestos var: Mountain Leather'
Localities: Garnet Hill Mine (Rheona claim), Garnet Hill, Calaveras Co., California, USA
Lang Mine (Sterling Mine; Sterling Borax Mine; Tick Canyon Borax Mine), Tick Canyon Borate deposit, Tick Canyon, Lang, Los Angeles Co., California, USA
Blythe, Riverside Co., California, USA
Ben Lomond Mountain, Santa Cruz Mts, Santa Cruz Co., California, USA
Asbolane
Formula: (Ni,Co)2-xMn4+(O,OH)4 · nH2O
Localities: Pacific Mine (Pacific Coast Borax Company properties; Borate; Borate Colemanite Mines; Calico; Old Borate; Pacific Coast Borax Co. workings), Calico, Calico District (Daggett District; Calico-Daggett area), Calico Mts (Calico Hills), San Bernardino Co., California, USA
Unnamed Mn-Ni occurrence [1], King C. Gillette farm, Lindsay, Tulare Co., California, USA
Oakland Magnesite Company prospect (Deer Creek and North Mine; Oakland Magnesite Mine; Langley lease), Tennessee Knob, Tulare Co., California, USA
Photo: © 2010, JGW. Asbolane from Unnamed Ni-Cr-Asbestos occurrences [1], Porterville, Tulare Co., California, USA
Atacamite
Formula: Cu2(OH)3Cl
Localities: Reported from at least 6 localities in this region.
Photo: © Brent Thorne 2010. Atacamite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Augelite
Formula: Al2(PO4)(OH)3
Locality: Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 and 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA
Photo: © Rock Currier. Augelite from Champion Mine, White Mountain Peak, White Mts, Mono Co., California, USA
'Augen gneiss'
Locality: Louisa Mine (Chausse), Mountain Spring Camp, Piute Mts [S], San Bernardino Co., California, USA
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Localities: Reported from at least 15 localities in this region.
Augite var: Fassaite
Formula: (Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Locality: Copper World Mine (Copper World; Copperworld Quartz Nos. 1 and 2; Ivanpah Copper; Dewey Ivanpah Mine; Dewey Mine; Old Ivanpah Copper Company), Clark Mountain, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Aurichalcite
Formula: (Zn,Cu)5(CO3)2(OH)6
Localities: Reported from at least 22 localities in this region.
Photo: © Doug Mersdon 2006. Aurichalcite from War Eagle Mine, Shoshone Mines, Upper Noonday Camp, Nopah Range, Inyo Co., California, USA
Aurivilliusite (TL)
Formula: (Hg+2)0.5Hg2+(I,Br,Cl)O
Type Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Reference: Roberts, A.C., J.A.R. Stirling, A.J. Criddle, G.E. Dunning, J. Spratt (2004) Mineralogical Magazine: 68(2): 241-245.
Austinite
Formula: CaZn(AsO4)(OH)
Localities: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Reward Mine (Brown Monster Mine; Ruth; Hirsch and Telescope group; Brown Monster-Reward; Graham-Jones; Eclipse; Golden West claims; Hidden Treasure group; F. D. Roosevelt claims), Reward, Russ District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Photo: Austinite from Reward Mine, Reward, Russ District, Inyo Mts, Inyo Co., California, USA
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Localities: Reported from at least 43 localities in this region.
Awaruite
Formula: Ni3Fe
Localities: Burro Mountain ultramafic complex, Burro Mountain, Los Burros District, Santa Lucia Mts (Santa Lucia Range), Monterey Co., California, USA
South Fork Smith River, Klamath Mts, Del Norte Co., California, USA
Axinite-(Fe)
Formula: Ca2Fe2+Al2BSi4O15OH
Localities: Reported from at least 12 localities in this region.
Photo: Axinite-(Fe) from New Melones Dam, West Belt, Calaveras Co., California, USA
'Axinite Group'
Localities: Reported from at least 37 localities in this region.
Photo: © Len Pisciotta 2007. Axinite Group from New Melones Dam, West Belt, Calaveras Co., California, USA
Axinite-(Mg)
Formula: Ca2MgAl2BSi4O15OH
Locality: Yankee Hill, Butte Co., California, USA
Photo: © C. Stefano '09. Axinite-(Mg) from Yankee Hill, Butte Co., California, USA
Axinite-(Mn)
Formula: Ca2Mn2+Al2BSi4O15(OH)
Localities: Little Three Mine (Little 3 mine), Ramona, Ramona District, San Diego Co., California, USA
Green Lead Mine (Greenlead Mine), Fawnskin (Grout), Bear Valley District, San Bernardino Mts, San Bernardino Co., California, USA
Consumnes Mine (Consumnes Copper Mine), Fair Play, Fairplay District, El Dorado Co., California, USA
Hercules Mine (Beryl claim; Hercules claim; Hercules group; Hercules prospect), Ramona, Ramona District, San Diego Co., California, USA
Greystone Mine, Genesee Valley, Plumas Co., California, USA
Photo: © Rob Lavinsky & irocks.com. Axinite-(Mn) from Little Three Mine, Ramona, Ramona District, San Diego Co., California, USA
Azurite
Formula: Cu3(CO3)2(OH)2
Localities: Reported from at least 160 localities in this region.
Photo: © Karl Volkman 04/05. Azurite from Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
Baddeleyite
Formula: ZrO2
Localities: Perovskite Peak (Perovskite Hill), Santa Rita Peak, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Chlorite Schist Knob area, South of the Dallas Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Bairdite (TL)
Formula: Pb2Cu2+4Te6+2O10(OH)2(SO4)•H2O
Type Locality: Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Habit: Diamond shaped crystals.
Colour: Fluorescent green.
Reference: Kampf, A.R., Mills, S.J., Housley, R.M., Rossman, G.R., Marty, J. and Thorne, B. (2013) Bairdite, IMA 2012-061. CNMNC Newsletter No. 15, February 2013, page 6; Mineralogical Magazine, 77, 1-12.
Localities: Recorded from at least 2 other localities in this region.
Photo: Bairdite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
'Bakerite' (FRL)
Formula: Ca4(H5B5Si3O20)
Type Locality: Corkscrew Canyon Mine (Corkscrew Mine), Ryan, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
Reference: www.mineralsocal.org; Mineralogical Magazine 1903 13 : 353-355.
Localities: Recorded from at least 7 other localities in this region.
Photo: © 2005, John Sobolewski. Bakerite from Corkscrew Canyon Mine, Ryan, Furnace Creek District, Inyo Co., California, USA
Banalsite
Formula: Na2BaAl4Si4O16
Locality: Banalsite occurrence, Santa Rita Peak, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Baotite
Formula: Ba4(Ti,Nb)8Si4O28Cl
Locality: California State Gem Mine (Dallas Gem Mine; Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Bario-orthojoaquinite (TL)
Formula: (Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O
Type Locality: California State Gem Mine (Dallas Gem Mine; Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Habit: Steep bipyramidal, truncated by the basal pinacoid.
Colour: Unknown
Description: Occurs in natrolite-filled veins cutting blueschist. Veins occur below the benitoite-neptunite joaquinite. Crystals to 8 mm long.
Reference: American Mineralogist (1982): 67: 809-816; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 470.
Localities: Recorded from at least 1 other locality in this region.
Photo: © Knut Eldjarn. Bario-orthojoaquinite from Victor claim, Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Barioperovskite (TL)
Formula: BaTiO3
Type Locality: California State Gem Mine (Dallas Gem Mine; Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Habit: Unknown
Colour: Unknown
Reference: IMA website - Proposals approved in January 2007
Photo: © California Institute of Technology. Barioperovskite from California State Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Bariopharmacosiderite
Formula: Ba0.5Fe3+4(AsO4)3(OH)4 · 5H2O
Locality: Antelope Neck Mine (Antelope Mine), Loyalton, Sierra Co., California, USA
'Barkevikite'
Localities: Unnamed Zeolite-Amphibole occurrence, West of the Dallas Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA (more information)
Unnamed Zeolite occurrence [1], Archer Camp, New Idria District, Diablo Range, Fresno Co., California, USA (more information)
South Riverside Drive, Griffith Park, Hollywood, Hollywood Hills, Los Angeles, Santa Monica Mts, Los Angeles Co., California, USA (more information)
Bartonite (TL)
Formula: K6Fe20S26S
Type Locality: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Colour: Blackish brown
Description: Anhedral masses to several mm diameter intergrown with pyrrhotite.
Reference: Czamanske, G.K., R.C. Erd, B.F. Leonard & J.R. Clark (1981), Bartonite, a new potassium iron sulfide mineral: American Mineralogist: 66: 369-375; Fleischer, M. (1979) New Mineral Names. Bartonite. American Mineralogist: 64: 241; Evans, H.T. and J.R. Clark (1981) The crystal structure of bartonite, a potassium iron sulfide and its relationship to pentlandite and djerfisherite. American Mineralogist: 66: 376-384; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 67; American Mineralogist: (1983) 68: 245-254.
Photo: © 2008, JGW. Bartonite from Coyote Peak, Coastal Range, Humboldt Co., California, USA
Baryte
Formula: BaSO4
Localities: Reported from at least 331 localities in this region.
Photo: © Rock Currier. Baryte from Palos Verdes Hills, Palos Verdes peninsula, Los Angeles Co., California, USA
Baryte var: Strontian Baryte
Formula: BaSO4
Locality: Bluebird Kyanite Mine (Vitrefax Mine; Bluebird Mine; Ogilby Kyanite deposit), Vitrefrax Hill (Bluebird Hill), Obregon, Cargo Muchacho District (Hedges District; Ogilby District), Cargo Muchacho Mts, Imperial Co., California, USA
Barytocalcite
Formula: BaCa(CO3)2
Locality: Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Barytolamprophyllite
Formula: (Ba,Na)2(Na,Ti,Fe3+)4Ti2(Si2O7)2O(OH,F)
Locality: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Photo: © 2008, JGW. Barytolamprophyllite from Coyote Peak, Coastal Range, Humboldt Co., California, USA
'Basalt'
Localities: Reported from at least 11 localities in this region.
'Basanite'
Locality: Dish Hill Crater (Dish Hill; Siberia Hill; Siberia Hill Crater), Trojan, San Bernardino Co., California, USA
Bassanite
Formula: CaSO4 · 0.5H2O
Localities: Reported from at least 7 localities in this region.
Photo: © Paul Broyles 2017. Bassanite from Calico District, Calico Mts, San Bernardino Co., California, USA
'Bastnäsite'
Localities: Unnamed REE pegmatite [1], Rainbow Wells, Marl Mts, San Bernardino Co., California, USA
Sulphide Queen Mine (Sulphide Queen body), Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Unknown REE-Baryte Mine [1], Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Bastnäsite-(Ce)
Formula: Ce(CO3)F
Localities: Birthday Mine (Birthday claim; Birthday area), Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Photo: Bastnäsite-(Ce) from Birthday Mine, Mountain Pass Mine, Mountain Pass, Mountain Pass District, Clark Mts, San Bernardino Co., California, USA
'Bauxite'
Locality: Middlesworth Clay Deposit (Middleworth; Brown Star Claims), Riverside Co., California, USA
Bavenite
Formula: Ca4Be2Al2Si9O26(OH)2
Localities: Himalaya Mine (Himalaya dikes; Himalaya pegmatite), Gem Hill, Mesa Grande District, San Diego Co., California, USA
Pala District, San Diego Co., California, USA
Smartville, Smartville District, Yuba Co., California, USA
New Almaden District, Santa Cruz Mts, Santa Clara Co., California, USA
Bayldonite
Formula: PbCu3(AsO4)2(OH)2
Localities: Lead Mountain Mine (Main Barite Mine), Lead Mountain [2], Barstow, Barstow District, San Bernardino Co., California, USA
Unnamed Cu-Pb-Ba occurrence [1], Lead Mountain [2], Barstow, Barstow District, San Bernardino Co., California, USA
Black Eagle Mine, Eagle Mountain, Eagle Mountains District (Monte Negro District), Eagle Mts, Riverside Co., California, USA
Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA ? (more information)
Photo: © 2008, JGW. Bayldonite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Bazirite
Formula: BaZr(Si3O9)
Localities: Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Baumann prospect (Bauman Ranch), Dumtah, Tulare Co., California, USA
Esquire No. 8 claim (Lander's Gillespite locality), Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Esquire No. 1 claim, Rush Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Snow Cap Mine, Rush Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Photo: © 2010, JGW. Bazirite from Esquire No. 8 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
'Beaverite-(Cu)'
Formula: Pb(Fe3+2Cu)(SO4)2(OH)6
Localities: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © Brent Thorne 2012. Beaverite-(Cu) from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Becquerelite
Formula: Ca(UO2)6O4(OH)6 · 8H2O
Locality: Superior Ridge deposits (White Ledge Peak deposits), San Emigdio Mts, Ventura Co., California, USA
Beidellite
Formula: (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Localities: Reported from at least 6 localities in this region.
'Beldongrite' ?
Formula: Mn18Fe2O33 · 8H2O
Locality: Crisle prospect (Crisle claim; Crisle Mine), Trimmer, Fresno Co., California, USA
Bementite
Formula: Mn7Si6O15(OH)8
Localities: Reported from at least 48 localities in this region.
Benitoite (TL)
Formula: BaTi(Si3O9)
Type Locality: California State Gem Mine (Dallas Gem Mine; Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Habit: Euhedral and anhedral crystals
Colour: Colorless, sapphire-blue.
Fluorescence: Blue (SW UV)
Description: Occurs as crystals attached to vein walls in natrolite-filled veins.
Reference: Louderback, George Davis & Walter C. Blasdale (1909), Benitoite, its mineralogy, paragenesis and mode of occurrence: University of California, Department of Geological Sciences Bulletin: 5: 331; Louderback, George Davis & Walter C. Blasdale (1907), Benitoite, a new California gem mineral, with chemical analysis by Walter C. Blasdale: University of California, Department of Geological Sciences Bulletin: 5: 149-153; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 102; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 372, 466; Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452.
Localities: Recorded from at least 11 other localities in this region.
Photo: © 1995-2001 Trinity Mineral Co.. Benitoite from California State Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Bermanite
Formula: Mn2+Mn3+2(PO4)2(OH)2 · 4H2O
Locality: Stewart Mine (MS 6162; Stewart Lithia mine), Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Berthierine
Formula: (Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4
Localities: Mines Road cross section, Diablo Range, Santa Clara Co., California, USA
Garzas, Mount Hamilton, Diablo Range, Santa Clara Co., California, USA
Berthierite
Formula: FeSb2S4
Localities: Murdock Mine [2] (Plumas Jumbo Mine), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
California Borate Company property (Western Borax Mine; Western Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Photo: © Philip Bluemner. Berthierite from Murdock Mine [2], Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Bertrandite
Formula: Be4(Si2O7)(OH)2
Localities: Pala District, San Diego Co., California, USA
Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill), Pala, Pala District, San Diego Co., California, USA
Vanderberg-Katerina pegmatites (Vanderburg-Katerina dikes; Vanderburg-Katerina pegmatites), Katerina Mine (Ashley mine; Caterina mine; Catherin mine; Catherina mine; Katrina mine), Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill), Pala, Pala District, San Diego Co., California, USA
Beryl
Formula: Be3Al2(Si6O18)
Localities: Reported from at least 88 localities in this region.
Photo: © 2009 Mark H.F. Mauthner. Beryl from Oceanview Mine, Elizabeth R. Mine, Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Localities: Reported from at least 42 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Aquamarine from Fano Mine, Little Cahuilla Mountain, Cahuilla District, Riverside Co., California, USA
Beryl var: Emerald
Formula: Be3Al2(Si6O18)
Locality: J. Carr's Mine, Coffee District (Coffee Creek District), Klamath Mts, Trinity Co., California, USA
Beryl var: Goshenite
Formula: Be3Al2(Si6O18)
Localities: Reported from at least 19 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Goshenite from Green Cloud Mine, Chihuahua Valley, Warner Springs District, San Diego Co., California, USA
Beryl var: Heliodor
Formula: Be3Al2(Si6O18)
Localities: Reported from at least 8 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Heliodor from Mack Mine, Rincon Mountain, Rincon, Rincon District, San Diego Co., California, USA
Beryl var: Morganite
Formula: Be3Al2(Si6O18)
Localities: Reported from at least 37 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Morganite from Stewart Mine, Tourmaline Queen Mountain, Pala, Pala District, San Diego Co., California, USA
Beudantite
Formula: PbFe3(AsO4)(SO4)(OH)6
Localities: Reported from at least 6 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Beudantite from Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
Beyerite
Formula: Ca(BiO)2(CO3)2
Localities: Reported from at least 6 localities in this region.
Bieberite
Formula: CoSO4 · 7H2O
Localities: Great Eastern Mine, Excelsior Mine (Excelsior group; Wotall; Lake/Blue Fox/C.B.C./Mammoth; Great Western Extension/California; Green Emigrant/Indian Boy/Pacific; New Hope/North Mammoth/Dam End; Great Eastern/Great Western; Confidence/Golden Eagle; Union No. 1 & 2 claims; Of What No. 1 & 2 claims), Summit City, Meadow Lake District, Nevada Co., California, USA
Island Mountain Mine (Dahrman group; Island Mountain Consolidated Mine; Annex; Leach; Merritt Gore; Shotgun), Moose Peak, Island Mountain, Coastal Range, Trinity Co., California, USA
Klau Mine (Sierra Morena Mine; Karl Mine; Santa Cruz Mine; Sunderland Mine; Carson Mine), Klau Mine group, Adelaida, Adelaide District (Adelaide Klau District), Santa Lucia Mts (Santa Lucia Range), San Luis Obispo Co., California, USA
Bigcreekite (TL)
Formula: BaSi2O5 · 4H2O
Type Locality: Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Reference: [Canadian Mineralogist(2001) 39, 761-768; MinRec 33:161]
Localities: Recorded from at least 2 other localities in this region.
Photo: © Knut Eldjarn. Bigcreekite from Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
'Bindheimite'
Formula: Pb2Sb2O6O
Localities: Reported from at least 17 localities in this region.
Photo: © mindat.org. Bindheimite from Cerro Gordo District, Inyo Mts, Inyo Co., California, USA
'Biotite'
Localities: Reported from at least 100 localities in this region.
Photo: © 1999 San Diego Mining Company. Biotite from Juan Diego Mine No. 1, Little Cahuilla Mountain, Cahuilla District, Riverside Co., California, USA
'Biotite schist'
Locality: Clipper Mountains Mine, Castle Dome, Gold Reef District, Clipper Mts, San Bernardino Co., California, USA
Birnessite
Formula: (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Localities: Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Blue Jay Mine (Blue Jay claim; Blue Bird Mine; McKnight; McKnight), Three Forks, Coastal Range, Trinity Co., California, USA
Photo: Birnessite from Boron, Kramer District, Kern Co., California, USA
Bismite
Formula: Bi2O3
Localities: Reported from at least 8 localities in this region.
Bismoclite
Formula: (BiO)Cl
Locality: Reward Mine (Brown Monster Mine; Ruth; Hirsch and Telescope group; Brown Monster-Reward; Graham-Jones; Eclipse; Golden West claims; Hidden Treasure group; F. D. Roosevelt claims), Reward, Russ District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Bismuth
Formula: Bi
Localities: Reported from at least 23 localities in this region.
Bismuthinite
Formula: Bi2S3
Localities: Reported from at least 25 localities in this region.
Photo: Bismuthinite from Reward Mine, Reward, Russ District, Inyo Mts, Inyo Co., California, USA
Bismutite
Formula: (BiO)2CO3
Localities: Reported from at least 24 localities in this region.
Photo: © Brent Thorne 2012. Bismutite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Bismutoferrite
Formula: Fe3+2Bi(SiO4)2(OH)
Locality: Lodi No. 4 Mine (Lodi No. 4 claim), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Bismutotantalite
Formula: Bi(Ta,Nb)O4
Locality: Tourmaline King Mine (Gem claim; King mine; MS 4500; MS 4926; Schuyler mine; Wilke mine), Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Photo: © 2009 Erik M. Cordova. Bismutotantalite from Tourmaline King Mine, Tourmaline Queen Mountain, Pala, Pala District, San Diego Co., California, USA
'Bitumen'
Localities: Reported from at least 11 localities in this region.
Photo: Bitumen from Beach cliffs, San Simeon, Santa Lucia Mts, San Luis Obispo Co., California, USA
'Bituminous-coal'
Locality: Santiago Mine, Santiago Canyon, Santa Ana Mts, Orange Co., California, USA
Blödite
Formula: Na2Mg(SO4)2 · 4H2O
Localities: Reported from at least 13 localities in this region.
Photo: © T. Kennedy 2002. Blödite from Soda Lake, Carrizo Plain, San Luis Obispo Co., California, USA
'Bloodstone'
Formula: SiO2
Localities: Reported from at least 9 localities in this region.
Bluebellite (TL)
Formula: Cu6[(I5+O3)(OH)3](OH)7Cl
Type Locality: Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Reference: Mills, S.J., Kampf, A.R., Christy, A.G., Housley, R.M., Rossman, G.R. and Reynolds, R.R. (2014) Bluebellite, IMA 2013- 121. CNMNC Newsletter No. 20, June 2014, page 550; Mineralogical Magazine, 78, 549-558; Mills, S.J., Kampf, A.R., Christy, A.G., Housley, R.M., Rossman, G.R., Reynolds, R.E., Marty, J. (2014): Bluebellite and mojaveite, two new minerals from the central Mojave Desert, California, USA. Mineralogical Magazine, 78, 1325-1340.
Photo: Bluebellite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Bohdanowiczite
Formula: AgBiSe2
Locality: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Böhmite
Formula: AlO(OH)
Locality: Alberhill Clay pits (Alberhill Coal & Clay Company deposit), Alberhill, Temescal Valley, Riverside Co., California, USA
Boleite
Formula: KPb26Ag9Cu24(OH)48Cl62
Localities: Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Bird Nest E3, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © Brent Thorne 2007. Boleite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Boltwoodite
Formula: (K,Na)(UO2)(SiO3OH) · 1.5H2O
Locality: New Method Mine (Hope Uranium prospect; Hope Mine; Hoping No. 1), Amboy area, Bristol Mts, San Bernardino Co., California, USA
Photo: © Michael Cline. Boltwoodite from New Method Mine, Amboy area, Bristol Mts, San Bernardino Co., California, USA
Boothite (TL)
Formula: CuSO4 · 7H2O
Type Locality: Alma Mine (Alma Pyrite Mine), Leona Heights deposit, Leona Heights, Oakland, Oakland Hills, Diablo Range, Alameda Co., California, USA
Reference: Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 505; Schaller, Waldemar Theodore (1903a), Minerals from Leona Heights, Alameda County, California: University of California, Department of Geological Sciences Bulletin: 3: 207; Schaller, Waldemar Theodore (1905b), Mineralogical notes: USGS Bulletin 262: 123; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 296.; Anthony R. Kampf & FM Locality Index Committee (1989) California Locality Index. Mineralogical Record, 20:129-142.
Localities: Recorded from at least 5 other localities in this region.
Photo: © 2009, JGW, courtesy Photographic Guide to Mineral Species. Boothite from Alma Mine, Leona Heights deposit, Leona Heights, Oakland, Oakland Hills, Diablo Range, Alameda Co., California, USA
Boracite
Formula: Mg3(B7O13)Cl
Localities: Pacific Mine (Pacific Coast Borax Company properties; Borate; Borate Colemanite Mines; Calico; Old Borate; Pacific Coast Borax Co. workings), Calico, Calico District (Daggett District; Calico-Daggett area), Calico Mts (Calico Hills), San Bernardino Co., California, USA
Unnamed B occurrence [1], Yermo (Marian; Marion; Otis), Calico District (Daggett District; Calico-Daggett area), Calico Mts (Calico Hills), San Bernardino Co., California, USA (more information)
Borax
Formula: Na2(B4O5)(OH)4 · 8H2O
Localities: Reported from at least 32 localities in this region.
Photo: © Rock Currier. Borax from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Bornite
Formula: Cu5FeS4
Localities: Reported from at least 157 localities in this region.
'Borocalcite'
Locality: Lick Springs, Shasta Co., California, USA
Boromuscovite (TL)
Formula: KAl2(BSi3O10)(OH)2
Type Locality: Little Three Mine (Little 3 mine), Ramona, Ramona District, San Diego Co., California, USA
Reference: Foord, Eugene E. et al (1989), Mineralogy and Paragenesis of the Little Three Mine Pegmatites, Ramona District, San Diego County, California. Mineralogical Record, 20(2): p. 111-112; American Mineralogist (1991), 76: 1998-2002.
Photo: © Alan Goldstein. Boromuscovite from Little Three Mine, Ramona, Ramona District, San Diego Co., California, USA
Botryogen
Formula: MgFe3+(SO4)2(OH) · 7H2O
Localities: Calistoga Mine (Silverado Mine; Palisade Mine; Palisades Mine; Grigsby Mine), The Palisades [range], Calistoga, Calistoga District (Silverado District), Mayacmas Mts (Mayacamas Mts), Napa Co., California, USA
Redington Mine (Boston Mine; Knoxville Mine; Excellsior Mine), Knoxville, Knoxville District, Napa Co., California, USA
Stayton Mine (Stayton Quicksilver Mine; Pacific claim of Stayton group), Antimony Peak, Stayton District (McLeod District; Panoche District), Diablo Range, Merced Co., California, USA
Sulphur Hole (Sulfur Hole; Sulphur pit), Calico, Calico District (Daggett District; Calico-Daggett area), Calico Mts (Calico Hills), San Bernardino Co., California, USA
Coso Hot Springs deposit, Coso Hot Springs, Coso District (New Coso District), Coso Mts (Coso Range), Inyo Co., California, USA
Photo: Botryogen from Redington Mine, Knoxville, Knoxville District, Napa Co., California, USA
Boulangerite
Formula: Pb5Sb4S11
Localities: Santa Cruz Co., California, USA
Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
Elias Bushati property, Lee Vining Canyon, Lee Vining, Tioga District, Mono Co., California, USA
Defiance Mine, Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA ? (more information)
Bournonite
Formula: PbCuSbS3
Localities: Cerro Gordo Mine, Cerro Gordo, Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Soledad Mountain (Butte Mountain), Mojave, Mojave-Rosamond District (Mojave District), Kern Co., California, USA
Surcease Mine (Bunker Hill Mine; Treasure Hill Mine), Big Bend, Butte Co., California, USA
Ubehebe Mine [1](Copper Bell Mine; Ubehebe Lead Mine), Teakettle Junction, Ubehebe District, Cottonwood Mts, Panamint Mts (Panamint Range), Inyo Co., California, USA
Boussingaultite
Formula: (NH4)2Mg(SO4)2 · 6H2O
Localities: The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Coso Hot Springs, Coso District (New Coso District), Coso Mts (Coso Range), Inyo Co., California, USA
South Mountain, Santa Paula, Ventura Co., California, USA
Geyser Canyon (Geyser Creek Canyon), The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Photo: © Arliguie M. Boussingaultite from The Geysers, West Mayacmas District, Mayacmas Mts, Sonoma Co., California, USA
Boyleite
Formula: (Zn,Mg)SO4 · 4H2O
Locality: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Brandholzite
Formula: Mg[Sb(OH)6]2 · 6H2O
Localities: San Bernardino Mts, San Bernardino Co., California, USA
Coleville, West Walker District (West Walker River District), Sweetwater Mts (Sweetwater Range), Mono Co., California, USA
Brannerite
Formula: (U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
Localities: Unspecified U occurrence (1), Coleville, West Walker District (West Walker River District), Sweetwater Mts (Sweetwater Range), Mono Co., California, USA
Little Nell property, Dogwood Peak, Plumas Co., California, USA
Red Boulder No. 1 prospect (Unnamed REE-U-Th occurrence [1]), One Hole Spring, Bighorn Mts, San Bernardino Co., California, USA
West Walker River Canyon occurrence, Wild Horse Mountain, Sweetwater Mts (Sweetwater Range), Mono Co., California, USA
Photo: Brannerite from Siberia, San Bernardino Co., California, USA
Braunite
Formula: Mn2+Mn3+6(SiO4)O8
Localities: Reported from at least 16 localities in this region.
'Bravoite'
Formula: (Fe,Ni)S2
Locality: Great Eastern and Mount Jackson Mine (Sonoma Mine; Sonoma Quicksilver Mines; Guerneville Mine; Great Eastern Mine; Mount Jackson Mine), Guerneville, Guerneville District, Coast Range, Sonoma Co., California, USA
Breithauptite
Formula: NiSb
Locality: Coyote Peak, Coastal Range, Humboldt Co., California, USA
'Brewsterite' ?
Locality: Ash Creek locality, Ash Creek, Pieta, Mendocino Co., California, USA
Brianyoungite
Formula: Zn3(CO3,SO4)(OH)4
Locality: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Brochantite
Formula: Cu4(SO4)(OH)6
Localities: Reported from at least 36 localities in this region.
Photo: © Doug Merson 2006. Brochantite from Reward Mine, Reward, Russ District, Inyo Mts, Inyo Co., California, USA
Bromargyrite
Formula: AgBr
Localities: Reported from at least 12 localities in this region.
Photo: © Brent Thorne 2007. Bromargyrite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Brookite
Formula: TiO2
Localities: Brookite occurrence, Mad River Rock, Coastal Range, Trinity Co., California, USA
Unspecified Ti-U-quartz occurrences [1], Placerville (Hangtown), Placerville District, Mother Lode Belt, El Dorado Co., California, USA
Red Rock Canyon prospects, Ricardo, El Paso Mountains District, El Paso Mts, Kern Co., California, USA
Unnamed Ti occurrence [1], Georgetown, Georgetown District, East Segment Mother Lode, Mother Lode Belt, El Dorado Co., California, USA
Devil Peak, Ralston Divide District, Placer Co., California, USA
Photo: © Mineralogical Research Company. Brookite from Brookite occurrence, Mad River Rock, Coastal Range, Trinity Co., California, USA
Brucite
Formula: Mg(OH)2
Localities: Reported from at least 20 localities in this region.
Photo: © 2008, JGW. Brucite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Brushite ?
Formula: Ca(HPO4) · 2H2O
Locality: Paoha Island, Mono Lake, Mono Co., California, USA
Buddingtonite (TL)
Formula: (NH4)(AlSi3)O8
Type Locality: Sulphur Bank Mine (Sulfur Bank Mine; Sulphur Bank deposits), Clear Lake Oaks, Sulphur Creek District (Sulfur Creek District; Wilbur Springs District), Lake Co., California, USA
Description: Occurs as a hydrothermal product in compact masses resulting from the action of ammonia-bearing hot springs on older rocks; pseudomorphs after plagioclase; largely in altered pyroxene andesite. Occasionally as small crystals.
Reference: Erd, R.C., D.E. White, J.J. Fahey & D.E. Lee (1964), Buddingtonite, an ammonium feldspar with zeolitic water: American Mineralogist: 49: 831, 833; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 279, 360.
Localities: Recorded from at least 8 other localities in this region.
Photo: © California Institute of Technology. Buddingtonite from Sharon Heights, Menlo Park, San Mateo Co., California, USA
Bultfonteinite
Formula: Ca2(HSiO4)F · H2O
Locality: Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Photo: © 2007 JSS. Bultfonteinite from Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Burckhardtite
Formula: Pb2(Fe3+Te6+)[AlSi3O8]O6
Localities: Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © Brent Thorne 2010. Burckhardtite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Burkeite (TL)
Formula: Na6(CO3)(SO4)2
Type Locality: Searles Lake, San Bernardino Co., California, USA
Description: Occurs chiefly in the lower salt; some fine-grained in the upper salt; pods and nodules in the mixed layer.
Reference: Foshag, William Frederick (1935), Burkeite, a new mineral species from Searles Lake, California: American Mineralogist: 20: 50-56; Smith, George Irving & D.V. Haines (1964), Character and distribution of nonclastic minerals in the Searles Lake evaporite deposit, California: USGS Bulletin 1181-P: 50; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 283; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 340, 633; Mineralogical Magazine (1979): 43: 341.
Localities: Recorded from at least 3 other localities in this region.
Photo: © Rruff Project. Burkeite from Searles Lake, San Bernardino Co., California, USA
Bustamite
Formula: CaMn2+(Si2O6)
Localities: Inyo Co., California, USA
Agnew Meadow Mine (Agnew Meadow Manganese prospect/deposit; Mammoth Lakes), Olaine Lake, Agnew Meadows, Madera Co., California, USA
Butlerite
Formula: Fe3+(SO4)(OH) · 2H2O
Locality: Coso Mine (Devil's Kitchen; Atlas; Lynch & Lynch; Nicol; Walley-Mickey & Wheeler), Coso Hot Springs deposit, Coso Hot Springs, Coso District (New Coso District), Coso Mts (Coso Range), Inyo Co., California, USA
Cacoxenite
Formula: Fe3+24Al(PO4)17O6(OH)12 · 17H2O
Locality: Slate Mountain Mine, Slate Mountain, Slate Mountain District, Slate Mts, El Dorado Co., California, USA
Photo: © SMS 2012. Cacoxenite from Slate Mountain Mine, Slate Mountain, Slate Mountain District, Slate Mts, El Dorado Co., California, USA
Calaverite (TL)
Formula: AuTe2
Type Locality: Stanislaus Mine, Carson Hill Gold Mining Company Mines (Carson Hill Mines), Melones, Carson Hill District (Melones District), Mother Lode Belt, Calaveras Co., California, USA
Reference: Genth F A (1868) Contributions to mineralogy - No. VII, The American Journal of Science and Arts: 312, 314; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 105, 109.
Localities: Recorded from at least 6 other localities in this region.
Photo: © Brent Thorne. Calaverite from Stanislaus Mine, Carson Hill Gold Mining Company Mines, Melones, Carson Hill District, Mother Lode Belt, Calaveras Co., California, USA
'Calcareous Tufa'
Locality: Mono Lake, Mono Co., California, USA
Photo: © Dragon Minerals. Calcareous Tufa from Mono Lake, Mono Co., California, USA
Calciocopiapite ?
Formula: CaFe4(SO4)6(OH)2 · 10H2O
Locality: Sulphur Hole (Sulfur Hole; Sulphur pit), Calico, Calico District (Daggett District; Calico-Daggett area), Calico Mts (Calico Hills), San Bernardino Co., California, USA
Photo: © 2007, JGW. Calciocopiapite from Sulphur Hole, Calico, Calico District, Calico Mts, San Bernardino Co., California, USA
Calcite
Formula: CaCO3
Localities: Reported from at least 588 localities in this region.
Photo: © 2005 Jake Harper www.earthquestminerals.com. Calcite from New Melones Dam, West Belt, Calaveras Co., California, USA
Calcite var: Calcite Satin Spar
Formula: CaCO3
Locality: Jensen Quarry (Oak Quarry), Jurupa, Jurupa Mts, Riverside Co., California, USA
Calcite var: Glendonite
Formula: CaCO3
Locality: Mono Lake, Mono Co., California, USA
Photo: © Photo & Collection of Martins da Pedra. Glendonite from Mono Lake, Mono Co., California, USA
Calcite var: Iceland Spar
Formula: CaCO3
Localities: Reported from at least 8 localities in this region.
Calcite var: Limestone Onyx
Formula: CaCO3
Localities: Reported from at least 6 localities in this region.
Calcite var: Sand-Calcite
Formula: CaCO3
Locality: Unnamed Sand Calcite occurrence, Parkfield area, Cholame Hills, Monterey Co., California, USA
Calcite var: Strontian Calcite
Formula: (Ca,Sr)CO3
Locality: Delhi, Merced Co., California, USA
Calderite
Formula: (Mn2+,Ca)3(Fe3+,Al)2(SiO4)3
Locality: Laytonville Quarry (Longvale; Longvale Quarry), Laytonville, Coastal Range, Mendocino Co., California, USA
Caledonite
Formula: Pb5Cu2(SO4)3(CO3)(OH)6
Localities: Reported from at least 24 localities in this region.
Photo: © J.Scovil. Caledonite from Reward Mine, Reward, Russ District, Inyo Mts, Inyo Co., California, USA
'Caliche'
Localities: Amargosa Valley, Inyo Co., California, USA
Caliche Quarry, Black Mountain [1], Rodman Mts, Belleville District, San Bernardino Co., California, USA
'Californite'
Formula: (Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Localities: Reported from at least 10 localities in this region.
Photo: © 12/2006. Californite from Pulga deposit, Pulga, Butte Co., California, USA
Calomel
Formula: (Hg2)2+Cl2
Localities: Reported from at least 9 localities in this region.
Photo: © Jasun McAvoy. Calomel from Challenge deposit, Emerald Lake Hills, San Mateo Co., California, USA
Cancrinite
Formula: (Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Locality: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Carboborite
Formula: Ca2Mg[B(OH)4]2(CO3)2 · 4H2O
Localities: Death Valley, Inyo Co., California, USA
Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
Carbonatecyanotrichite
Formula: Cu4Al2(CO3,SO4)(OH)12 · 2H2O
Locality: Engles Mine, Lights Creek Copper deposits (Moonlight Mine; Sulfide Ridge deposits; Lights Canyon deposits), Moonlight Peak, Taylorsville District, Plumas Copper Belt, Plumas Co., California, USA
Photo: © Łukasz Kruszewski 2016. Carbonatecyanotrichite from Engles Mine, Lights Creek Copper deposits, Moonlight Peak, Taylorsville District, Plumas Copper Belt, Plumas Co., California, USA
Carlsbergite
Formula: CrN
Locality: Goose Lake meteorite, Goose Lake, Modoc Co., California, USA
Carminite
Formula: PbFe3+2(AsO4)2(OH)2
Localities: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Photo: © R.D.Green. Carminite from Mohawk Mine Annex [1], Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
Carnotite
Formula: K2(UO2)2(VO4)2 · 3H2O
Localities: Reported from at least 27 localities in this region.
Photo: Carnotite from Bluebird Kyanite Mine, Vitrefrax Hill, Obregon, Cargo Muchacho District, Cargo Muchacho Mts, Imperial Co., California, USA
Carpathite
Formula: C24H12
Localities: 4th of July Mine, Flint group (Boston; Fourth of July; Monterey; Andy Johnson claim; Red Rock; Clear Creek), Hernandez, Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Picacho Mine (Picachos Mine; Los Picachos Mine; Picahotes Mine; Benta Mine; Hernandez Mine; Ramirez Mine; Bonanza Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Leza pit No. 1, New Idria District, Diablo Range, San Benito Co., California, USA
Photo: © Antonio Borrelli. Carpathite from Picacho Mine, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Caryopilite
Formula: Mn2+3Si2O5(OH)4
Localities: Buckeye Mine (Buckeye Mines; Wright Mine), Mount Oso, Ladd-Buckeye District, Diablo Range, Stanislaus Co., California, USA
Manga-Chrome Mine (Manga Chrome; Magna-Chrome Mine; Duggan Mine; Steams and Owens [?]), Limekiln, Spenceville District, Nevada Co., California, USA
Smith Mine (Smith prospect), Higgins Corner, Spenceville District, Nevada Co., California, USA
Cassiterite
Formula: SnO2
Localities: Reported from at least 39 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Cassiterite from Cryo-Genie Mine, Warner Springs, Warner Springs District, San Diego Co., California, USA
Cassiterite var: Wood Tin
Formula: SnO2
Locality: Temescal Mine, South Riverside, Santa Ana Mts, Riverside Co., California, USA
'Cathedral Quartz'
Locality: Carmelita Mine (Big Spring mine; Blue Gem claim; Crest Gem mine; Elinor deposit; Elinor mine; Estudillo mine; French Pete mine; MS 6130; Peter Cabat mine), Chihuahua Valley, Warner Springs District, San Diego Co., California, USA
'CCUK-10'
Formula: Hg-N-I-(Cl,Br)
Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
'CCUK-12'
Formula: Hg-O-I-(Cl,Br)
Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
'CCUK-13'
Formula: Hg-Si-O
Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
'CCUK-14'
Formula: Hg-Si-O
Localities: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Picacho Mine (Picachos Mine; Los Picachos Mine; Picahotes Mine; Benta Mine; Hernandez Mine; Ramirez Mine; Bonanza Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
'CCUK-15'
Formula: Hg+10Hg2+3O6I2(Cl,Br)2
Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
'CCUK-18'
Formula: Hg2+2N(I,Cl,Br).H2O
Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
'CCUK-8'
Formula: Hg-CrO4-S-nH2O ?
Localities: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Vaughn Mine, Diablo Range, San Benito Co., California, USA
Cebollite
Formula: Ca5Al2(SiO4)3(OH)4
Locality: Crestmore quarries, Crestmore, Riverside Co., California, USA
Celadonite
Formula: K(Mg,Fe2+)Fe3+(Si4O10)(OH)2
Localities: Reported from at least 6 localities in this region.
Celestine
Formula: SrSO4
Localities: Reported from at least 43 localities in this region.
Photo: © The-Vug.com. Celestine from Pacific Mine, Calico, Calico District, Calico Mts, San Bernardino Co., California, USA
Celestine var: Barian Celestine
Formula: (Sr,Ba)SO4
Localities: Birthday Mine (Birthday claim; Birthday area), Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA ? (more information)
Celsian
Formula: Ba(Al2Si2O8)
Localities: Reported from at least 6 localities in this region.
Photo: © Arliguie M. Celsian from Fresno Co., California, USA
Cerchiaraite-(Al) (TL)
Formula: Ba4Al4O3(OH)3(Si4O12)[Si2O3(OH)4]Cl
Type Locality: Esquire No. 1 claim, Rush Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Reference: Kampf, A.R., Roberts, A.C., Venance, K.E., Dunning, G.E. and Walstrom, R.E. (2012): Cerchiaraite-(Al), IMA 2012-011. CNMNC Newsletter No. 13, June 2012, page 815; Mineralogical Magazine, 76, 807-817
Localities: Recorded from at least 2 other localities in this region.
Cerchiaraite-(Fe) (TL)
Formula: Ba4Fe3+4O3(OH)3(Si4O12)[Si2O3(OH)4]Cl
Type Locality: Esquire No. 8 claim (Lander's Gillespite locality), Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Reference: Kampf, A.R., Roberts, A.C.,Venance, K.E., Carbone, C., Dunning, G.E. and Walstrom, R.E. (2012): Cerchiaraite-(Fe), IMA 2012-012. CNMNC Newsletter No. 13, June 2012, page 815; Mineralogical Magazine, 76, 807-817.
Localities: Recorded from at least 2 other localities in this region.
Cerianite-(Ce)
Formula: (Ce4+,Th)O2
Locality: Brilliant claim (Brilliant Mine; Brilliant ledge), Ord Mountain Mine (Ord Mountain Mine System; Ord Mine; Ord Mountain deposits; Osborn; Rio Vista claim; Brilliant claim; Josephine claim; Belgium claim; Copper Junction claim), Ord Mountain, Ord Mts, Ord District, San Bernardino Co., California, USA
Cerite-(Ce)
Formula: (Ce,Ca)9(Mg,Fe)(SiO4)3(HSiO4)4(OH)3
Locality: Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Cerussite
Formula: PbCO3
Localities: Reported from at least 140 localities in this region.
Photo: © Karl Volkman 04/05. Cerussite from Felix Mine, Azusa, San Gabriel Mts, Los Angeles Co., California, USA
Cerussite var: Argentiferous Cerussite
Formula: PbCO3
Locality: Metal Mountain Mine, Metal Mountain, Live Oak Springs area, In-Ko-Pah Mts (In-Ko-Pah Range), San Diego Co., California, USA
Cervantite
Formula: Sb3+Sb5+O4
Localities: Reported from at least 16 localities in this region.
Cervelleite
Formula: Ag4TeS
Localities: Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
NE2 vein, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
'Chabazite'
Localities: Reported from at least 18 localities in this region.
Chabazite-Na
Formula: (Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2O
Localities: Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
U.S. Borax open pit (Boron pit), U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
U.S. Borax open pit (Boron pit), U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Photo: © Dick Dionne. Chabazite-Na from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Chalcanthite
Formula: CuSO4 · 5H2O
Localities: Reported from at least 32 localities in this region.
Photo: © Brent Thorne 2008. Chalcanthite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Chalcocite
Formula: Cu2S
Localities: Reported from at least 136 localities in this region.
'Chalcodite'
Formula: K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
Locality: Hillsdale Mine (Chaboya - Hillsdale Mine; San Juan Bautista Mine; San Juan Mine; San Juan Quicksilver Mine; Sheboya Mine; Chapman Mine; Oak Hill Mine), Oak Hill, San Jose, Santa Clara Co., California, USA
Chalcophanite
Formula: (Zn,Fe,Mn)Mn3O7 · 3H2O
Localities: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Opal Hill Mine, Mule Mts, Riverside Co., California, USA
Photo: © Karl Volkman 04/05. Chalcophanite from Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
Chalcophyllite
Formula: Cu18Al2(AsO4)4(SO4)3(OH)24 · 36H2O
Locality: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Chalcopyrite
Formula: CuFeS2
Localities: Reported from at least 760 localities in this region.
Photo: © Jay Buscio. Chalcopyrite from Afterthought Mine, Ingot, East Shasta Copper - Zinc District, Klamath Mts, Shasta Co., California, USA
Chalcopyrite var: Blister Copper
Formula: CuFeS2
Locality: Iron Mountain Mine (Number 8; Confidence; Old Mine), Iron Mountain, Iron Mountain [town], West Shasta Copper - Zinc District, Klamath Mts, Shasta Co., California, USA
Chalcosiderite
Formula: CuFe3+6(PO4)4(OH)8 · 4H2O
Locality: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
'Chalcotrichite'
Formula: Cu2O
Locality: Lion Mine, Stonyford, Coast Ranges, Colusa Co., California, USA
Chenguodaite
Formula: Ag9Fe3+Te2S4
Locality: Harvard Mine (Harvard Mine group; McCann claim; Mooney claim; Pacific claim; Vulture claim; Trio claim; Sobrante claim), Jamestown Mine (Jamestown group), Jamestown, Jamestown District, Mother Lode Belt, Tuolumne Co., California, USA
Photo: © Marko Burkhardt. Chenguodaite from Harvard Mine, Jamestown Mine, Jamestown, Jamestown District, Mother Lode Belt, Tuolumne Co., California, USA
'Chert'
Localities: Reported from at least 39 localities in this region.
Photo: © 2006 Peter Cristofono. Chert from Jalama Beach, Las Cruces, Santa Barbara Co., California, USA
Chestermanite (TL)
Formula: Mg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2
Type Locality: Unnamed Skarn occurrence [1], Lakeshore, Fresno Co., California, USA
Reference: Canadian Minelalogist Vol.26, pp. 911-916 (1988)
Photo: © 2008, JGW, courtesy of Photographic Guide to Mineral Species. Chestermanite from Unnamed Skarn occurrence [1], Lakeshore, Fresno Co., California, USA
'Chevkinite Group'
Localities: Little Chief Granite Dome, Panamint (old Panamint), Panamint District (Ballarat District), Panamint Mts (Panamint Range), Inyo Co., California, USA
Panamint Mts (Panamint Range), Inyo Co., California, USA
Chlorapatite
Formula: Ca5(PO4)3Cl
Locality: Los Angeles Martian meteorite, Los Angeles Co., California, USA
Chlorargyrite
Formula: AgCl
Localities: Reported from at least 96 localities in this region.
Photo: © Brent Thorne 2012. Chlorargyrite from Bird Nest E3, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Chlorargyrite var: Bromian Chlorargyrite
Formula: Ag(Cl,Br)
Localities: Reported from at least 22 localities in this region.
Photo: Bromian Chlorargyrite from A. O. prospect, Mount General, Hinkley, Barstow District, San Bernardino Co., California, USA
Chlorargyrite var: Iodian Bromian Chlorargyrite
Formula: Ag(Cl,Br,I)
Locality: Bagdad-Chase Mine (Barstow mill; Camp Rochester; Pacific Mine; Pacific Mines; Roosevelt Consolidated Mine; Buckeye-Stedman-Bagdad Chase Mine), Stedman, Stedman District (Ludlow; Rochester; Buckeye), Bullion Mts (Bullion Range), San Bernardino Co., California, USA
Chlorellestadite
Formula: Ca5(SiO4)1.5(SO4)1.5Cl
Locality: Crestmore quarries, Crestmore, Riverside Co., California, USA - erroneously reported
'Chlorite Group'
Localities: Reported from at least 161 localities in this region.
Photo: © Dan Weinrich Minerals. Chlorite Group from Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
'Chlorite schist'
Locality: Chlorite Schist Knob area, South of the Dallas Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Chloritoid
Formula: (Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
Localities: Unnamed Chloritoid occurrence [1], Garlock, El Paso Mountains District, El Paso Mts, Kern Co., California, USA
Bessemer Mine (Iron Mountain Mine; Bessemer and Western Mine), Bessemer Mines, Iron Ridge, Lava Beds District (Newberry District), Lava Bed Mts, San Bernardino Co., California, USA
Chloromagnesite
Formula: MgCl2
Locality: Saratoga Spring, Ibex Hills, San Bernardino Co., California, USA
Choloalite
Formula: (Cu,Sb)3(Pb,Ca)3(TeO3)6Cl
Locality: McAlpine Mine, Peñon Blanco Peak, Coulterville District, Mother Lode Belt, Tuolumne Co., California, USA
Photo: © Brent Thorne 2009. Choloalite from McAlpine Mine, Peñon Blanco Peak, Coulterville District, Mother Lode Belt, Tuolumne Co., California, USA
Chondrodite
Formula: (Mg,Fe2+)5(SiO4)2(F,OH)2
Localities: Reported from at least 13 localities in this region.
Photo: Chondrodite from Crestmore quarries, Crestmore, Riverside Co., California, USA
'Chrome-Spinel (of Dana)'
Localities: Red Mountain-Del Puerto ultramafic mass, Red Mountain, Black Wonder District, Diablo Range, Stanislaus Co., California, USA
Red Mountain-Del Puerto ultramafic mass, Red Mountain, Black Wonder District, Diablo Range, Stanislaus Co., California, USA
Chromite
Formula: Fe2+Cr3+2O4
Localities: Reported from at least 1023 localities in this region.
Photo: © Paul J Broyles 2011. Chromite from Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Chromschieffelinite (TL)
Formula: Pb10Te6+6O20(OH)14(CrO4)(H2O)5
Type Locality: Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Habit: orthorhombic
Colour: light yellow
Reference: Anthony R. Kampf, Stuart J. Mills, Robert M. Housley, Michael S. Rumsey, and John Spratt (2012), Lead-tellurium oxysalts from Otto Mountain near Baker, California: VII. Chromschieffelinite, Pb10Te6O20(CrO4)(H2O)5, the chromate analogue of schieffelinite. American Mineralogist: 97: 212-219.
Chrysoberyl
Formula: BeAl2O4
Localities: Unspecified Chrysoberyl occurrence (1), Big Bar Mountain, Butte Co., California, USA
Stanwood (Stanwood Saddle ?), Butte Co., California, USA
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Localities: Reported from at least 189 localities in this region.
Photo: © Dick Dionne. Chrysocolla from Telescope Mine, Reward Mine, Reward, Russ District, Inyo Mts, Inyo Co., California, USA
'Chrysoprase'
Localities: Reported from at least 13 localities in this region.
Chrysotile
Formula: Mg3(Si2O5)(OH)4
Localities: Reported from at least 64 localities in this region.
Churchite-(Y)
Formula: Y(PO4) · 2H2O
Locality: Sausalito Road Quarry, Sausalito, Marin Co., California, USA
Photo: © Pavel M. Kartashov collection & photo. Churchite-(Y) from Sausalito Road Quarry, Sausalito, Marin Co., California, USA
Cinnabar
Formula: HgS
Localities: Reported from at least 372 localities in this region.
Photo: Cinnabar from Contact Mine, Castle Rock Springs area, West Mayacmas District, Mayacmas Mts, Sonoma Co., California, USA
'Clastic sedimentary rock'
Locality: Mud Hills Mine, Rainbow Basin, Mud Hills (Strontium Hills), Barstow District, San Bernardino Co., California, USA
Claudetite
Formula: As2O3
Localities: Unnamed S prospect, 4-S Ranch area, Imperial Co., California, USA
Island Mountain Mine (Dahrman group; Island Mountain Consolidated Mine; Annex; Leach; Merritt Gore; Shotgun), Moose Peak, Island Mountain, Coastal Range, Trinity Co., California, USA (more information)
Photo: © Rob Lavinsky & irocks.com. Claudetite from Imperial Co., California, USA
Clausthalite
Formula: PbSe
Localities: Darwin District, Darwin Hills, Inyo Co., California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
'Clay'
Localities: Reported from at least 28 localities in this region.
'Clays'
Localities: Reported from at least 317 localities in this region.
Clearcreekite (TL)
Formula: (Hg+2)1.5(CO3)(OH) · 2H2O
Type Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Reference: Mineralogical Record: 33: 162; Canadian Mineralogist (2001): 39: 779-784.
Clinobisvanite
Formula: Bi(VO4)
Localities: Reported from at least 7 localities in this region.
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Localities: Reported from at least 98 localities in this region.
Photo: © 2006 JSS. Clinochlore from Mistake Mine, Butler Estate Chrome deposit, Wright Mountain, New Idria District, Diablo Range, Fresno Co., California, USA
Clinochlore var: Chromian Clinochlore
Formula: Mg5(Al,Cr)2Si3O10(OH)8
Localities: Reported from at least 55 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Chromian Clinochlore from Unnamed Opal occurrence, Dunsmuir, Siskiyou Co., California, USA
Clinochlore var: Pennine
Formula: Mg5Al(AlSi3O10)(OH)8
Localities: Reported from at least 15 localities in this region.
Clinochlore var: Ripidolite
Formula: (Mg,Fe,Al)6(Si,Al)4O10(OH)8
Localities: Flagstaff Hill occurrences, Flagstaff Hill, Salmon Falls District (Flagstaff Hill area), El Dorado Co., California, USA
Pacific Quartz Mine (Pacific Mine), Placerville (Hangtown), Placerville District, Mother Lode Belt, El Dorado Co., California, USA
Clinochlore var: Sheridanite
Formula: (Mg,Al,Fe)6(Si,Al)4O10(OH)8
Localities: Mistake Mine (Butler Estate Mine; Mistaken; Big Ridge & Mistake Mine; James-Thickston; James-Thickstun Mine), Butler Estate Chrome deposit, Wright Mountain, New Idria District, Diablo Range, Fresno Co., California, USA
Flagstaff Hill occurrences, Flagstaff Hill, Salmon Falls District (Flagstaff Hill area), El Dorado Co., California, USA
'Clinochrysotile'
Localities: Darwin District, Darwin Hills, Inyo Co., California, USA
Butler Estate Chrome deposit, Wright Mountain, New Idria District, Diablo Range, Fresno Co., California, USA
Humboldt Co., California, USA
Union Carbide Mine (Union Carbide Nuclear Mine), Condon Peak, New Idria District, Diablo Range, Fresno Co., California, USA
San Francisco, San Francisco Co., California, USA
Clinoclase
Formula: Cu3(AsO4)(OH)3
Localities: Antelope Neck Mine (Antelope Mine), Loyalton, Sierra Co., California, USA
Murdock Mine [2] (Plumas Jumbo Mine), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Photo: Clinoclase from Antelope Neck Mine, Loyalton, Sierra Co., California, USA
Clinoenstatite
Formula: MgSiO3
Locality: Dish Hill Crater (Dish Hill; Siberia Hill; Siberia Hill Crater), Trojan, San Bernardino Co., California, USA
Clinoferrosilite
Formula: Fe2+SiO3
Localities: Coso Hot Springs deposit, Coso Hot Springs, Coso District (New Coso District), Coso Mts (Coso Range), Inyo Co., California, USA
Unspecified Clinoferrosilite occurrence [1], Coso District (New Coso District), Coso Mts (Coso Range), Inyo Co., California, USA
Unnamed lava flow [1], Sugarloaf Mountain, Coso District (New Coso District), Coso Mts (Coso Range), Inyo Co., California, USA
Clinohumite
Formula: Mg9(SiO4)4F2
Localities: Reported from at least 9 localities in this region.
Photo: © 2008, JGW. Clinohumite from Crestmore quarries, Crestmore, Riverside Co., California, USA
'Clinoptilolite'
Localities: Reported from at least 54 localities in this region.
Photo: Clinoptilolite from Kanan Road, Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Clinoptilolite-K
Formula: K6(Si30Al6)O72·20H2O
Locality: Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Clinoptilolite-Na (TL)
Formula: Na6(Si30Al6)O72·20H2O
Type Locality: Barstow Formation, Rainbow Basin, Mud Hills (Strontium Hills), Barstow District, San Bernardino Co., California, USA
Reference: The Canadian Mineralogist Vol. 35, pp. 1571-1606 (1997)
Localities: Recorded from at least 2 other localities in this region.
Photo: © Kelly Starnes. Clinoptilolite-Na from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
'Clinopyroxene Subgroup'
Localities: Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Birch Creek, White Mts, Inyo Co., California, USA
Clinozoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Localities: Reported from at least 33 localities in this region.
Photo: Clinozoisite from Plumas Co., California, USA
'Clinozoisite-Epidote Series'
Localities: Old Hag prospect No. 1, Van Dam Peak, Poway, San Diego Co., California, USA
Old Hag prospect #2, Van Dam Peak, Poway, San Diego Co., California, USA
Clintonite
Formula: Ca(Mg,Al)3(Al3SiO10)(OH)2
Localities: Reported from at least 10 localities in this region.
Photo: © Dan & Diana Weinrich Minerals. Clintonite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Clintonite var: Valuevite
Formula: Ca(Mg,Al)3(Al3SiO10)(OH)2
Locality: Crestmore, Riverside Co., California, USA
'Coal'
Localities: Marin Co., California, USA
Santiago Mine, Santiago Canyon, Santa Ana Mts, Orange Co., California, USA
Coalingite (TL)
Formula: Mg10Fe3+2(OH)24[CO3] · 2H2O
Type Locality: New Idria Serpentinite Asbestos deposits, Wright Mountain, New Idria District, Diablo Range, Fresno Co., California, USA
Description: Occurs in the surface weathering zone of the New Idria deposits. Occurs as individual plates almost invariably intergrown with chrysotile or hydrotalcite.
Reference: Mumpton, F.A. Jaffe, H.W., and Thompson, C.S. (1965) Coalingite, a new mineral from the New Idria serpentinite, Fresno and San Benito counties, California. American Mineralogist: 50: 1893-1913; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 198.
Localities: Recorded from at least 5 other localities in this region.
Photo: © Knut Eldjarn. Coalingite from Clear Creek deposits, Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Cobaltite
Formula: CoAsS
Localities: Reported from at least 15 localities in this region.
Cobaltpentlandite
Formula: (Co,Ni,Fe)9S8
Localities: Alta Mine (Alta California Mine; Alta Copper claim), Low Divide, Low Divide District, Klamath Mts, Del Norte Co., California, USA
Low Divide District, Klamath Mts, Del Norte Co., California, USA
Coffinite
Formula: (U4+,Th)(SiO4)1-x(OH)4x
Localities: Juniper Mine, Kennedy Meadow, Tuolumne Co., California, USA
Little Sparkler Mine (Little Sparkler prospect), Miracle Hot Springs (Hobo Hot Springs), Kern River Uranium District, Kern Co., California, USA
Cohenite
Formula: Fe3C
Locality: Goose Lake meteorite, Goose Lake, Modoc Co., California, USA
Colemanite (TL)
Formula: Ca[B3O4(OH)3] · H2O
Type Locality: Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
Reference: Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 352; Erd, R.C., J.F. McAllister, and A.C. Vlisidis (1970) Wardsmithite 5CaO • MgO •12B2O3 •30H2O, a new borate mineral from the Death Valley region, California. American Mineralogist: 55: 351; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 290.
Localities: Recorded from at least 97 other localities in this region.
Photo: © Rock Currier. Colemanite from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Coloradoite
Formula: HgTe
Localities: Jamestown Mine (Jamestown group), Jamestown, Jamestown District, Mother Lode Belt, Tuolumne Co., California, USA
Carson Hill, Carson Hill District (Melones District), Mother Lode Belt, Calaveras Co., California, USA
Stanislaus Mine, Carson Hill Gold Mining Company Mines (Carson Hill Mines), Melones, Carson Hill District (Melones District), Mother Lode Belt, Calaveras Co., California, USA
Norwegian Mine, Tuttletown, Tuttletown District, Mother Lode Belt, Tuolumne Co., California, USA
Melones Mine, Carson Hill Gold Mining Company Mines (Carson Hill Mines), Melones, Carson Hill District (Melones District), Mother Lode Belt, Calaveras Co., California, USA
Columbite-(Fe)
Formula: FeNb2O6
Localities: Reported from at least 7 localities in this region.
Photo: © 2005 SLR. Columbite-(Fe) from Williamson Mine, Cahuilla Mountain, Cahuilla District, Riverside Co., California, USA
'Columbite-(Fe)-Columbite-(Mn) Series'
Localities: Reported from at least 34 localities in this region.
Photo: Columbite-(Fe)-Columbite-(Mn) Series from Fano Mine, Little Cahuilla Mountain, Cahuilla District, Riverside Co., California, USA
Columbite-(Mn)
Formula: (Mn,Fe)(Nb,Ta)2O6
Localities: Reported from at least 11 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Columbite-(Mn) from Elizabeth R. Mine, Chief Mountain, Pala, Pala District, San Diego Co., California, USA
'Columbite-Tantalite'
Localities: Reported from at least 6 localities in this region.
'Conglomerate'
Localities: Section 1 Iron occurrence (Unnamed Iron occurrence), Eagle Peak, Sacramento Mts, San Bernardino Co., California, USA
Red Top Clay Deposit, Riverside Co., California, USA
Boston Valley Salt prospect, Sheep Creek Spring, Avawatz Mts (Avawatz Range), San Bernardino Co., California, USA
Owls Head Celestite prospect (Owlshead), Owl Hole Springs, Owlshead Mts, San Bernardino Co., California, USA
Conichalcite
Formula: CaCu(AsO4)(OH)
Localities: Reported from at least 8 localities in this region.
Photo: © Karl Volkman 04/05. Conichalcite from Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
Connellite
Formula: Cu19(SO4)(OH)32Cl4 · 3H2O
Localities: Unnamed Cu occurrence (1), Buchanan Mine area, Buchanan Mine (Johnson group; Johnston), Iron Mountain (2), Daulton, Daulton District, Madera Co., California, USA
Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
England claim, Ord Mountain Mine (Ord Mountain Mine System; Ord Mine; Ord Mountain deposits; Osborn; Rio Vista claim; Brilliant claim; Josephine claim; Belgium claim; Copper Junction claim), Ord Mountain, Ord Mts, Ord District, San Bernardino Co., California, USA
Photo: © Brent Thorne 2012. Connellite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Cookeite
Formula: (Al2Li)Al2(AlSi3O10)(OH)8
Localities: Reported from at least 17 localities in this region.
Cooperite
Formula: PtS
Localities: Burns Creek Mine, Quartzburg School, Quartzburg, Hornitos District, West Belt, Mariposa Co., California, USA
Unnamed PGE placer (1), Hughson, Stanislaus Co., California, USA
Knights Ferry, Stanislaus Co., California, USA
Snelling placers, Merced River, Snelling, Snelling District, Merced Co., California, USA
Hoopa Indian Reservation placers, Pekwuteu, Hoopa Indian Reservation, Klamath Mts, Humboldt Co., California, USA
Copiapite
Formula: Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Localities: Reported from at least 19 localities in this region.
Photo: © Christopher O'Neill. Copiapite from Santa Maria Mts, Blythe, Riverside Co., California, USA
Copiapite var: Knoxvillite
Formula: Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Locality: Redington Mine (Boston Mine; Knoxville Mine; Excellsior Mine), Knoxville, Knoxville District, Napa Co., California, USA
Copper
Formula: Cu
Localities: Reported from at least 121 localities in this region.
Photo: © Jasun McAvoy & mineralman.com. Copper from Bully Hill Mine, Bully Hill, Bully Hill, Bully Hill District, East Shasta Copper - Zinc District, Klamath Mts, Shasta Co., California, USA
'Copper Stain'
Localities: Reported from at least 42 localities in this region.
Coquimbite
Formula: Fe2-xAlx(SO4)3 · 9H2O, x ~0.5
Localities: Reported from at least 15 localities in this region.
Photo: © mindat.org. Coquimbite from Coso Hot Springs deposit, Coso Hot Springs, Coso District, Coso Mts, Inyo Co., California, USA
Corderoite
Formula: Hg2+3S2Cl2
Locality: Cactus Gold Mine (Blue Eagle Mine; Middle Buttes Mine; Cactus Mine; Cactus Queen Mine; Shumake deposit; Shumake Mine), Middle Buttes deposit (Cactus deposit), Middle Butte, Rosamond, Mojave-Rosamond District (Mojave District), Kern Co., California, USA
Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Localities: Reported from at least 15 localities in this region.
Corkite
Formula: PbFe3(PO4)(SO4)(OH)6
Localities: Reward Mine (Brown Monster Mine; Ruth; Hirsch and Telescope group; Brown Monster-Reward; Graham-Jones; Eclipse; Golden West claims; Hidden Treasure group; F. D. Roosevelt claims), Reward, Russ District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: Corkite from Reward Mine, Reward, Russ District, Inyo Mts, Inyo Co., California, USA
Cornubite
Formula: Cu5(AsO4)2(OH)4
Locality: Murdock Mine [2] (Plumas Jumbo Mine), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Cornwallite
Formula: Cu5(AsO4)2(OH)4
Localities: Antelope Neck Mine (Antelope Mine), Loyalton, Sierra Co., California, USA
Murdock Mine [2] (Plumas Jumbo Mine), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Bird Nest E3, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © 2006 JSS. Cornwallite from Murdock Mine [2], Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Coronadite
Formula: Pb(Mn4+6Mn3+2)O16
Localities: Reported from at least 9 localities in this region.
Photo: © john hagstrom. Coronadite from Lead Mountain Mine, Lead Mountain [2], Barstow, Barstow District, San Bernardino Co., California, USA
Corrensite
Formula: (Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O
Locality: Garzas, Mount Hamilton, Diablo Range, Santa Clara Co., California, USA
Corundum
Formula: Al2O3
Localities: Reported from at least 26 localities in this region.
Photo: © 2003 Scott L. Ritchie. Corundum from Unnamed Corundum occurrences, San Jacinto Mts, Riverside Co., California, USA
Corundum var: Ruby
Formula: Al2O3
Locality: Cascade Canyon, San Gabriel Mts, San Bernardino Co., California, USA
Photo: © J.Ralph 2010. Ruby from Cascade Canyon, San Gabriel Mts, San Bernardino Co., California, USA
Corundum var: Sapphire
Formula: Al2O3
Localities: Reported from at least 7 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Sapphire from Unnamed Corundum occurrences, San Jacinto Mts, Riverside Co., California, USA
Cosalite
Formula: Pb2Bi2S5
Locality: Darwin District, Darwin Hills, Inyo Co., California, USA
Cotunnite
Formula: PbCl2
Locality: Bird Nest E3, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Coulsonite
Formula: Fe2+V3+2O4
Locality: Unnamed V-Fe occurrence [1], Archer Camp, New Idria District, Diablo Range, Fresno Co., California, USA
Covellite
Formula: CuS
Localities: Reported from at least 55 localities in this region.
Photo: © Alfredo Petrov. Covellite from Unnamed Au prospect [15], Quartzburg, Hornitos District, West Belt, Mariposa Co., California, USA
Coyoteite (TL)
Formula: NaFe3S5 · 2H2O
Type Locality: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Colour: Black
Description: Small grains (only a few found).
Reference: Erd, R.C. and G.K. Czamanske (1981) Orickite and coyoteite, two new sulfide minerals, American Mineralogist; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 67; American Mineralogist: (1983) 68: 245-254.
Photo: © 2008, JGW. Coyoteite from Coyote Peak, Coastal Range, Humboldt Co., California, USA
Crandallite
Formula: CaAl3(PO4)(PO3OH)(OH)6
Localities: Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 and 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA
Slate Mountain Mine, Slate Mountain, Slate Mountain District, Slate Mts, El Dorado Co., California, USA
Photo: © SMS 2010. Crandallite from Slate Mountain Mine, Slate Mountain, Slate Mountain District, Slate Mts, El Dorado Co., California, USA
Creaseyite
Formula: Pb2Cu2Fe3+2(Si4.67Al0.33)O15.33(OH)3 · H2O
Localities: Reported from at least 7 localities in this region.
Photo: © Brent Thorne 2007. Creaseyite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Crednerite
Formula: CuMnO2
Localities: Calistoga, Calistoga District (Silverado District), Mayacmas Mts (Mayacamas Mts), Napa Co., California, USA
Unspecified Cu-Mn occurrence (1), Calistoga, Calistoga District (Silverado District), Mayacmas Mts (Mayacamas Mts), Napa Co., California, USA
Creedite
Formula: Ca3SO4Al2F8(OH)2 · 2H2O
Localities: Reported from at least 6 localities in this region.
Photo: © Michael Cline. Creedite from Darwin District, Darwin Hills, Inyo Co., California, USA
'Crestmoreite'
Localities: Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Wet Weather Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Lone Star Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Photo: Crestmoreite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Cristobalite
Formula: SiO2
Localities: Reported from at least 38 localities in this region.
Photo: © 2002 John H. Betts. Cristobalite from Coso Hot Springs deposit, Coso Hot Springs, Coso District, Coso Mts, Inyo Co., California, USA
Crocoite
Formula: Pb(CrO4)
Localities: Eldorado Mine (New Eldorado Mine), Fried Liver Wash, Hexie Mts, Riverside Co., California, USA
Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Darwin District, Darwin Hills, Inyo Co., California, USA
Cronstedtite
Formula: Fe2+2Fe3+((Si,Fe3+)2O5)(OH)4
Locality: Sutter's Mill meteorite, Sutter Mill Bar and River (Old Sutter Mill site), Coloma, Coloma District, West Belt, El Dorado Co., California, USA
'Crossite'
Localities: Reported from at least 19 localities in this region.
Photo: Crossite from North Berkeley, Berkeley, Alameda Co., California, USA
Cryptomelane
Formula: K(Mn4+7Mn3+)O16
Localities: Reported from at least 7 localities in this region.
Cubanite
Formula: CuFe2S3
Localities: Mohawk Mine, Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Walker Mine (Walker Brothers Mine; Walker Copper Mine; Native Son Mine [?]), Argentine Rock, Genesee Valley District (Genesee District), Plumas Copper Belt, Plumas Co., California, USA
Ne Plus Ultra Mine (Daulton Copper Mine; Dalton Mine; Daulton Copper deposit; California Copper Co.), Daulton group, Daulton, Daulton District, Madera Co., California, USA
Island Mountain Mine (Dahrman group; Island Mountain Consolidated Mine; Annex; Leach; Merritt Gore; Shotgun), Moose Peak, Island Mountain, Coastal Range, Trinity Co., California, USA
Cummingtonite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Localities: Daggett, Calico District (Daggett District; Calico-Daggett area), Calico Mts (Calico Hills), San Bernardino Co., California, USA
Pine Flat Road area, Ben Lomond Mountain area, Ben Lomond Mountain, Santa Cruz Mts, Santa Cruz Co., California, USA
Cuprite
Formula: Cu2O
Localities: Reported from at least 69 localities in this region.
Cuprocopiapite
Formula: CuFe4(SO4)6(OH)2 · 20H2O
Locality: Newton Mine (Newton Copper Mine; Jackson Mine), Sunnybrook, Pardee District, Amador Co., California, USA
Cupropavonite
Formula: Cu0.9Ag0.5Pb0.6Bi2.5S5
Locality: Lucky Lucy Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Cuproroméite (TL)
Formula: Cu2Sb2(O,OH)7
Type Locality: Blind Spring Hill, Benton, Blind Spring District (Blind Spring Hill District; Benton District), Benton Range, Mono Co., California, USA
Reference: Arents (1867); Mineralogical Magazine (1953): 30: 100, 362; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 184.
Localities: Recorded from at least 6 other localities in this region.
Photo: © Dan & Diana Weinrich Minerals. Cuproroméite from Cornucopia Mine, Buscones Peak, Blind Spring Hill, Benton, Blind Spring District, Benton Range, Mono Co., California, USA
Cuprosklodowskite
Formula: Cu(UO2)2(SiO3OH]2 · 6H2O
Localities: Mohawk Mine, Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Ram deposit (Ram Mine; Ram prospect), Old Dale area, Pinto Mts, Riverside Co., California, USA
Chilcoot, Diamond Mts, Plumas Co., California, USA
Cuprotungstite
Formula: Cu2(WO4)(OH)2
Localities: Reported from at least 6 localities in this region.
Photo: © Dan & Diana Weinrich Minerals. Cuprotungstite from Plumas Co., California, USA
Cuspidine
Formula: Ca4(Si2O7)(F,OH)2
Locality: Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Photo: © 2008, JGW. Cuspidine from Crestmore quarries, Crestmore, Riverside Co., California, USA
Cyanotrichite
Formula: Cu4Al2(SO4)(OH)12 · 2H2O
Localities: Unspecified Pb-Cu-Zn occurrence [1], Clark Mountain, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
England claim, Ord Mountain Mine (Ord Mountain Mine System; Ord Mine; Ord Mountain deposits; Osborn; Rio Vista claim; Brilliant claim; Josephine claim; Belgium claim; Copper Junction claim), Ord Mountain, Ord Mts, Ord District, San Bernardino Co., California, USA
Cymrite
Formula: BaAl2Si2(O,OH)8 · H2O
Localities: Cymrite-Jadeite occurrence, Panoche Pass, Diablo Range, San Benito Co., California, USA
Road West of the Pacheco Pass summit, Pacheco Pass, Diablo Range, Santa Clara Co., California, USA
'Dachiardite'
Localities: Reported from at least 7 localities in this region.
Photo: © Dick Dionne. Dachiardite from Opal Hill Mine, Mule Mts, Riverside Co., California, USA
'Dacite'
Localities: Unnamed Au-Ag-Cu mine [7], Ragtown, Stedman District (Ludlow; Rochester; Buckeye), Bullion Mts (Bullion Range), San Bernardino Co., California, USA
Unnamed Au-Ag-Cu mine [10], Ragtown, Stedman District (Ludlow; Rochester; Buckeye), Bullion Mts (Bullion Range), San Bernardino Co., California, USA
Bitter Spring Clay prospect, Bitter Spring, San Bernardino Co., California, USA
Danburite
Formula: CaB2Si2O8
Localities: Little Three Mine (Little 3 mine), Ramona, Ramona District, San Diego Co., California, USA
Jensen Quarry (Oak Quarry), Jurupa, Jurupa Mts, Riverside Co., California, USA
Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Pack Rat Mine, Tule Mountain (Mount Tule; Tulley Mountain), Jacumba, Jacumba District, San Diego Co., California, USA
Little Three Mine area, Ramona, Ramona District, San Diego Co., California, USA
Photo: © Rob Lavinsky & irocks.com. Danburite from Little Three Mine, Ramona, Ramona District, San Diego Co., California, USA
Darapskite
Formula: Na3(SO4)(NO3) · H2O
Localities: Death Valley, San Bernardino Co., California, USA
Death Valley, Inyo Co., California, USA
Funeral Mts (Funeral Range), Amargosa Range, Inyo Co., California, USA
Amargosa Valley, Inyo Co., California, USA
Datolite
Formula: Ca(HBSiO5)
Localities: Reported from at least 13 localities in this region.
Daubréelite
Formula: Fe2+Cr3+2S4
Localities: Goose Lake meteorite, Goose Lake, Modoc Co., California, USA
Old Woman meteorite, Sheep Camp Spring, Old Woman District, Old Woman Mts, San Bernardino Co., California, USA
Dawsonite
Formula: NaAlCO3(OH)2
Localities: Oriental Mine (Alta Mine), 16 to 1 Mine (Sixteen-to-One Mine; Original Sixteen-to-One Mine), Alleghany, Alleghany District (Forest District), Sierra Co., California, USA
Amargosa Canyon, Tecopa, Sperry Hills, Saratoga District (Tecopa Mountain District; Shoshone District ?), Inyo Co., California, USA
Paradise Flat, Rooster Comb, Orestimba District, Diablo Range, Stanislaus Co., California, USA
Dawsonite var: Chromian Dawsonite
Formula: NaAlCO3(OH)2
Locality: Paradise Flat, Rooster Comb, Orestimba District, Diablo Range, Stanislaus Co., California, USA
Deanesmithite (TL)
Formula: (Hg+2)Hg2+3(CrO4)S2O
Type Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Reference: Canadian Mineralogist (1993): 31: 787-793.; Mineralogical Record (1993): 24: 471-475.
Photo: © Knut Eldjarn. Deanesmithite from Clear Creek claim, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Deerite (TL)
Formula: (Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5
Type Locality: Laytonville Quarry (Longvale; Longvale Quarry), Laytonville, Coastal Range, Mendocino Co., California, USA
Reference: Agrell, S.O. (1964), Deerite, howieite, and zussmanite, three new minerals from the Franciscan of the Laytonville district, Mendocino County, California (title only), Am. Min.: 49.; Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370.; Robert Muir Wood (1982) The Laytonville Quarry (Mendocino County California) Exotic Block: Iron-rich Blueschist-Facies Subduction-Zone Metamorphism. Mineralogical Magazine 45:87-99.
Localities: Recorded from at least 7 other localities in this region.
Photo: © Sandro Maggia. Deerite from Laytonville Quarry, Laytonville, Coastal Range, Mendocino Co., California, USA
Delafossite
Formula: CuFeO2
Locality: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Delindeite
Formula: (Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O
Locality: California State Gem Mine (Dallas Gem Mine; Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Photo: © John Veevaert. Delindeite from California State Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Desautelsite
Formula: Mg6Mn3+2(OH)16[CO3] · 4H2O
Localities: Artinite pit, Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Coalinga Asbestos Mine (Coalinga Mine; Coalinga Asbestos deposit), Coalinga area, Diablo Range, Fresno Co., California, USA
Herman Akers claim, Coalinga, Fresno Co., California, USA
Unnamed prospect, Northeast of Picacho Peak, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Photo: © 2004 Robert O. Meyer. Desautelsite from Artinite pit, Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Descloizite
Formula: PbZn(VO4)(OH)
Localities: Reported from at least 6 localities in this region.
Photo: Descloizite from A. O. prospect, Mount General, Hinkley, Barstow District, San Bernardino Co., California, USA
Descloizite var: Cuprian Descloizite
Formula: Pb(Zn,Cu)VO4OH
Locality: Leiser Ray Mine (Lester Ray-Goffs Mine; Camp Signal Mine; Vanadium King Mine; California Comstock; Louisiana-California Co.; Vanadium Gold Co.), Signal Hill, Piute Range [N], Signal District (Vontrigger District; Hackberry Mountain), San Bernardino Co., California, USA
Photo: © Brent Thorne 2010. Cuprian Descloizite from Leiser Ray Mine, Signal Hill, Piute Range [N], Signal District, San Bernardino Co., California, USA
Devilline
Formula: CaCu4(SO4)2(OH)6 · 3H2O
Localities: Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Photo: © 2008, JGW. Devilline from Crestmore quarries, Crestmore, Riverside Co., California, USA
Devitoite (TL)
Formula: [Ba6(PO4)2(CO3)][Fe2+7(OH)4Fe3+2O2(Si4O12)2]
Type Locality: Esquire No. 8 claim (Lander's Gillespite locality), Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Reference: Kampf, A.R., Rossman, G.R., Steele, I.M., Pluth, J.J., Dunning, G.E., Walstrom, R.E. (2010): Devitoite, a new heterophyllosilicate with astrophyllite-like layers from eastern Fresno County, California. Canadian Mineralogist, 48, 29-40.
Localities: Recorded from at least 2 other localities in this region.
Photo: © 2010, JGW. Devitoite from Esquire No. 8 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
'Deweylite'
Formula: Mg4Si3O10 · 6H2O ?
Localities: Reported from at least 6 localities in this region.
Photo: © 2008, JGW. Deweylite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Diaboleite
Formula: Pb2CuCl2(OH)4
Localities: Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Bird Nest E3, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © JM 2010. Diaboleite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Diadochite
Formula: Fe3+2(PO4)(SO4)(OH) · 5H2O
Locality: New Idria Mine (New Idria group; New Hope vein), Idria (New Idria), New Idria District, Diablo Range, San Benito Co., California, USA
Diamond
Formula: C
Localities: Reported from at least 28 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Diamond from Trinity Co., California, USA
Diaspore
Formula: AlO(OH)
Localities: Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 and 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA
Unnamed Skarn occurrence [1], Lakeshore, Fresno Co., California, USA
Janokis Ranch, Vallecito, Vallecito District, Calaveras Co., California, USA
Twin Lakes Limestone deposit, Lower Twin Lake, Twin Lakes, Fresno Co., California, USA
'Diatomite'
Formula: SiO2 · nH2O
Localities: Reported from at least 95 localities in this region.
Photo: © Amir Akhavan. Diatomite from San Miguelito Canyon Road Diatomite outcrop, Lompoc, Santa Barbara Co., California, USA
Dickite
Formula: Al2(Si2O5)(OH)4
Localities: Sulphur Dome claim (Sulfur Dome claim), Cachuma Village, Cachuma District, San Rafael Mts, Santa Barbara Co., California, USA
Lassen Peak, Lassen Volcanic National Park, Cascade Range, Shasta Co., California, USA
Digenite
Formula: Cu9S5
Localities: Reported from at least 8 localities in this region.
Photo: © Rockpick Legend Co. & Rick Dalrymple. Digenite from California State Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Diopside
Formula: CaMgSi2O6
Localities: Reported from at least 116 localities in this region.
Photo: © 2007 Peter Cristofono. Diopside from Crestmore quarries, Crestmore, Riverside Co., California, USA
Diopside var: Chromian Diopside
Formula: (Ca,Cr)MgSi2O6
Locality: Unnamed Cr occurrence (21), Yreka, Siskiyou Co., California, USA
Diopside var: Diallage
Formula: CaMgSi2O6
Localities: Reported from at least 7 localities in this region.
Diopside var: Violan
Formula: CaMgSi2O6
Locality: Big Canyon (Big Canyon Creek), Hidden Valley Lake, Lake Co., California, USA
Dioptase
Formula: CuSiO3 · H2O
Localities: Reported from at least 8 localities in this region.
Photo: © 2004 Robert O. Meyer. Dioptase from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
'Diorite'
Localities: Reported from at least 32 localities in this region.
Djerfisherite
Formula: K6(Fe,Cu,Ni)25S26Cl
Locality: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Djurleite
Formula: Cu31S16
Localities: California State Gem Mine (Dallas Gem Mine; Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Junnila Mine, New Idria District, Diablo Range, San Benito Co., California, USA
Photo: © db. Djurleite from California State Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
'Dolerite'
Locality: Mount Zion Mine, Diablo, Diablo Range, Contra Costa Co., California, USA
Dolomite
Formula: CaMg(CO3)2
Localities: Reported from at least 154 localities in this region.
Photo: © David J. Eicher. Dolomite from Christie Mine, Wright Mountain, New Idria District, Diablo Range, Fresno Co., California, USA
Dolomite var: Ferroan Dolomite
Formula: CaMg(CO3)2
Localities: Heath Canyon occurrences, Wrightwood, San Gabriel Mts, San Bernardino Co., California, USA
Coulterville, Coulterville District, Mother Lode Belt, Mariposa Co., California, USA
McAlpine Mine, Peñon Blanco Peak, Coulterville District, Mother Lode Belt, Tuolumne Co., California, USA
Oro Rico Mine (Penon Blanco Mine), Peñon Blanco Peak, Coulterville, Coulterville District, Mother Lode Belt, Mariposa Co., California, USA
'Dolostone'
Localities: Paradise Mountains Tungsten deposit (Paradise Mtns Tungsten deposit), Paradise Springs, Grapevine District, Paradise Range, San Bernardino Co., California, USA
Eagle Mountain Mine (Eagle Mountain Iron Mine; Eagle Mountain Iron deposit; Kaiser Steel Corp.), Eagle Mountain, Eagle Mountains District (Monte Negro District), Eagle Mts, Riverside Co., California, USA
Unspecified Jade occurrence [1], Eagle Mountains District (Monte Negro District), Eagle Mts, Riverside Co., California, USA
Donharrisite
Formula: Ni3HgS3
Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Photo: © Knut Eldjarn. Donharrisite from Clear Creek claim, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Dravite
Formula: Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Localities: Reported from at least 9 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Dravite from Audrey Lynn Mine, Little Cahuilla Mountain, Cahuilla District, Riverside Co., California, USA
'Dravite-Schorl Series' ?
Locality: Audrey Lynn Mine (Audrey Lynne Mine; Jumping Joe claims), Little Cahuilla Mountain, Cahuilla District, Riverside Co., California, USA
Dufrénoysite
Formula: Pb2As2S5
Locality: Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Duftite
Formula: PbCu(AsO4)(OH)
Localities: Reported from at least 7 localities in this region.
Photo: © Brent Thorne 2011. Duftite from Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
Dugganite
Formula: Pb3Zn3(AsO4)2(TeO6)
Localities: Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
SW cut, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © Brent Thorne 2008. Dugganite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Dumortierite
Formula: (Al,Fe3+)7(SiO4)3(BO3)O3
Localities: Reported from at least 14 localities in this region.
Photo: © California Institute of Technology. Dumortierite from Dehesa, San Diego Co., California, USA
Dypingite
Formula: Mg5(CO3)4(OH)2 · 5H2O
Localities: Artinite pit, Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Unnamed prospect, Northeast of Picacho Peak, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Photo: © Matteo Chinellato. Dypingite from New Idria District, Diablo Range, San Benito Co., California, USA
Dzhalindite
Formula: In(OH)3
Locality: War Eagle Mine, Shoshone Mines (Shoshone Mines group; Shoshone Mine group; Grant Mine; Mabel Mine; Black Prince Mine), Upper Noonday Camp, Nopah Range, Inyo Co., California, USA
Ecdemite
Formula: Pb6Cl4(As2O7)
Locality: Defense Mine, Lookout City, Lookout District (Modoc District), Argus Mts (Argus Range), Inyo Co., California, USA
Eckermannite ?
Formula: NaNa2(Mg4Al}Si8O22(OH)2
Locality: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Eckhardite (TL)
Formula: (Ca,Pb)Cu2+Te6+O5(H2O)
Type Locality: Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Habit: Acicular
Colour: blue green
Reference: Kampf, A.R., Mills, S.J., Housley, R.M., Rossman, G.R., Marty, J. and Thorne, B. (2013) Eckhardite, IMA 2012-085. CNMNC Newsletter No. 16, August 2013, page 2696; Mineralogical Magazine, 77, 2695-2709
Localities: Recorded from at least 2 other localities in this region.
Photo: © 2012 Chuck Adan. Eckhardite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
'Eclogite'
Localities: Unnamed Eclogite occurrence (1), Healdsburg, Sonoma Co., California, USA
Unnamed Eclogite outcrop (2), Jenner, Russian River District, Coast Range, Sonoma Co., California, USA
Edenite
Formula: {Na}{Ca2}{Mg5}(AlSi7O22)(OH)2
Localities: Meadow Valley Post Office vicinity, Meadow Valley, Edmanton District (Meadow Valley District), Plumas Co., California, USA
Unnamed Plumasite occurrence (1), Spanish Peak, Edmanton District (Meadow Valley District), Plumas Co., California, USA
Edgarbaileyite (TL)
Formula: (Hg-Hg)3Si2O7
Type Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Reference: Mineralogical Record: 21: 215-220.; Mineralogical Record (1993): 24: 471-475.
Localities: Recorded from at least 2 other localities in this region.
Photo: © Maurice de Graaf. Edgarbaileyite from Clear Creek claim, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Edingtonite
Formula: Ba[Al2Si3O10] · 4H2O
Localities: Ash Creek locality, Ash Creek, Pieta, Mendocino Co., California, USA
Esquire No. 8 claim (Lander's Gillespite locality), Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Photo: © Van King. Edingtonite from Ash Creek locality, Ash Creek, Pieta, Mendocino Co., California, USA
Edoylerite (TL)
Formula: Hg2+3(CrO4)S2
Type Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Description: White paper available upon request
Reference: Mineralogical Record (1993): 24(6): 471-480; Dunning, Hadley, Cooper, Magnasco collections
Photo: © Thomas Witzke and Abraxas-Verlag. Edoylerite from Clear Creek claim, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Eglestonite
Formula: (Hg2+2)3OCl3(OH)
Localities: Reported from at least 9 localities in this region.
Photo: © 2003 ROM. Eglestonite from Challenge deposit, Emerald Lake Hills, San Mateo Co., California, USA
Ekanite
Formula: Ca2ThSi8O20
Locality: Baumann prospect (Bauman Ranch), Dumtah, Tulare Co., California, USA
Elbaite
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Localities: Reported from at least 42 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Elbaite from Himalaya Mine, Gem Hill, Mesa Grande District, San Diego Co., California, USA
'Elbaite-Schorl Series'
Localities: Reported from at least 8 localities in this region.
Photo: © 2006 SLR. Elbaite-Schorl Series from Lookout Mine, Ramona, Ramona District, San Diego Co., California, USA
'Electrum'
Formula: (Au, Ag)
Localities: Reported from at least 24 localities in this region.
Photo: © Carles Curto Milà. Electrum from Hornitos, Hornitos District, West Belt, Mariposa Co., California, USA
'Ellestadite'
Locality: Wet Weather Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Photo: © J.Ralph 2002. Ellestadite from Crestmore quarries, Crestmore, Riverside Co., California, USA
'Emery'
Localities: Queenie Mine, Ricardo, El Paso Mountains District, El Paso Mts, Kern Co., California, USA
J and L claim, Red Buttes, El Paso Mountains District, El Paso Mts, Kern Co., California, USA
Emmonsite
Formula: Fe3+2(TeO3)3 · 2H2O
Locality: Calaveras Co., California, USA
Emplectite
Formula: CuBiS2
Localities: Murdock Mine [2] (Plumas Jumbo Mine), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Morning Star Mine (Curtz Mine; Ardis Mine), Mogul Peak, Monitor - Mogul District, Alpine Co., California, USA
Enargite
Formula: Cu3AsS4
Localities: Reported from at least 16 localities in this region.
Photo: © Karl Volkman 03/05. Enargite from Monitor - Mogul District, Alpine Co., California, USA
Enstatite
Formula: MgSiO3
Localities: Reported from at least 23 localities in this region.
Enstatite var: Bronzite
Formula: (Mg,Fe2+)2[SiO3]2
Localities: Littlerock meteorite, Littlerock, San Gabriel Mts, Los Angeles Co., California, USA
Unspecified Zeolite-Phosphate occurrences, Berkeley Hills, Berkeley, Alameda Co., California, USA
San Emigdio meteorite, San Emigdio Mts, Kern Co., California, USA
San Juan Capistrano meteorite, San Juan Capistrano, Orange Co., California, USA
Eosphorite
Formula: Mn2+Al(PO4)(OH)2 · H2O
Locality: Pack Rat Mine, Tule Mountain (Mount Tule; Tulley Mountain), Jacumba, Jacumba District, San Diego Co., California, USA
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Localities: Reported from at least 316 localities in this region.
Photo: Epidote from Pioneer-Lilyama Mine, Pilot Hill, Pilot Hill District, El Dorado Co., California, USA
Epistilbite
Formula: CaAl2Si6O16 · 5H2O
Localities: Santa Monica Mts, Los Angeles/Ventura Co., California, USA
Southern Pacific Silica Quarry (Southern Pacific Quarry; S.P. Silica Quarry; S.P. Mine; Nuevo Quarry; Nuevo Mine), Lakeview Mountains, Nuevo, Riverside Co., California, USA
Circle X Boy Scout Camp zeolite locality, Sandstone Peak, Santa Monica Mountains Conservancy, Santa Monica Mts, Ventura Co., California, USA
Sulphur Creek District (Sulfur Creek District; Wilbur Springs District), Coast Ranges, Colusa Co., California, USA
Crestmore quarries, Crestmore, Riverside Co., California, USA
Epsomite
Formula: MgSO4 · 7H2O
Localities: Reported from at least 42 localities in this region.
Erdite (TL)
Formula: NaFeS2 · 2H2O
Type Locality: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Description: Occurs as tiny patches peripheral to a large knot of pyrrhotite and rasvumite. Commonly associated with fine-grained, euhedral magnetite crystals.
Reference: Czamanske, G.K., B.F. Leonard & J.R. Clark (1980), Erdite, a new hydrated sodium iron sulfide mineral: American Mineralogist: 65: 506-515; Konnert, J.A. and Evans, H.T. (1980) The crystal structure of erdite, NaFeS2 •2H2O. American Mineralogist: 65: 516-521; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 67, 367; American Mineralogist: (1983) 68: 245-254.
Photo: © 2008, JGW. Erdite from Coyote Peak, Coastal Range, Humboldt Co., California, USA
'Erionite'
Localities: Reported from at least 9 localities in this region.
Photo: © Van King. Erionite from Kanan Road, Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Erionite-Na (TL)
Formula: (Na2,K2,Ca)2[Al4Si14O36] · 15H2O
Type Locality: Cady Mts, San Bernardino Co., California, USA
Reference: Am.Min. 83 (1998), 577
Erlichmanite (TL)
Formula: OsS2
Type Locality: MacIntosh Mine, Willow Creek (China Flat), Willow Creek District, Klamath Mts, Humboldt Co., California, USA
Description: Occurs as small grains about 20 microns.
Reference: Dana's New Mineralogy; Pemberton, H. Earl (1983), Minerals of California: 63.; Snetsinger, K.G. (1971b) Erlichmanite (OsS2), a new mineral. American Mineralogist: 56: 1501-1506.
Localities: Recorded from at least 1 other locality in this region.
Erythrite
Formula: Co3(AsO4)2 · 8H2O
Localities: Reported from at least 16 localities in this region.
Photo: © T.Kennedy 2002. Erythrite from San Bernardino Co., California, USA
Eskimoite
Formula: Ag7Pb10Bi15S36
Localities: St. Charles Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Jackass Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Eskolaite
Formula: Cr2O3
Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Photo: © 2011, JGW. Eskolaite from Clear Creek claim, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Esquireite (TL)
Formula: BaSi6O13·7H2O
Type Locality: Esquire No. 1 claim, Rush Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Reference: Kampf, A.R., Housley, R.M., Dunning, G.E. and Walstrom, R.E. (2015) Esquireite, IMA 2014-066. CNMNC Newsletter No. 23, February 2015, page 53; Mineralogical Magazine, 79, 51-58.; Kampf, A.R., Housley, R.M., Dunning, G.E., Walstrom, R.E. (2015): Esquireite, BaSi6O13∙7H2O, a new layer silicate from the barium silicate deposits of California. Canadian Mineralogist, 53, 3-12.
Localities: Recorded from at least 2 other localities in this region.
Photo: © Reiner Mielke. Esquireite from Rush Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Ettringite
Formula: Ca6Al2(SO4)3(OH)12 · 26H2O
Locality: Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Photo: © Doug Merson 2006. Ettringite from Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Eugsterite
Formula: Na4Ca(SO4)3 · 2H2O
Locality: Eagle Borax Spring, Death Valley, Inyo Co., California, USA
Eulytine
Formula: Bi4(SiO4)3
Localities: San Diego Co., California, USA
Pala District, San Diego Co., California, USA
Elizabeth R. Mine (Hazel W. claim), Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © JM-2013. Eulytine from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Euxenite-(Y)
Formula: (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Localities: Reported from at least 6 localities in this region.
'Evaporite'
Localities: Unnamed Gypsum prospect [2], Sheep Creek Spring, Avawatz Mts (Avawatz Range), San Bernardino Co., California, USA
King Salt prospect, Sheep Creek Spring, Avawatz Mts (Avawatz Range), San Bernardino Co., California, USA
Fort Cady deposit (Fort Cady Solution Mine; Fort Cady project), Hector, San Bernardino Co., California, USA
Unnamed Sr-B-borate occurrence [1] (Unnamed Evaporite occurrence), Resting Spring Range, Inyo Co., California, USA
Koehn Lake evaporite deposit, Koehn Lake (Kane Springs; Desert Springs), Saltdale, Fremont Valley, Kern Co., California, USA
Eztlite
Formula: Pb2Fe3+6(Te4+O3)3(Te6+O6)(OH)10 · 8H2O
Localities: Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © Brent Thorne 2013. Eztlite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Fairbankite
Formula: Pb(TeO3)
Locality: Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA - erroneously reported
Fairfieldite
Formula: Ca2(Mn2+,Fe2+)(PO4)2 · 2H2O
Locality: Elizabeth R. Mine (Hazel W. claim), Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Famatinite
Formula: Cu3SbS4
Localities: Morning Star Mine (Curtz Mine; Ardis Mine), Mogul Peak, Monitor - Mogul District, Alpine Co., California, USA
Darwin District, Darwin Hills, Inyo Co., California, USA
Thompson Mine, Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Pittsburg-Liberty Mine (Pittsburg claim; Pittsburg No. 2 claim; Liberty claim; Liberty No. 2 claim), New York Hill, Masonic District, Bodie Hills, Mono Co., California, USA
Photo: © Jasun McAvoy & mineralman.com. Famatinite from Morning Star Mine, Mogul Peak, Monitor - Mogul District, Alpine Co., California, USA
Faujasite-Ca
Formula: (Ca,Na2,Mg)3.5[Al7Si17O48] · 32H2O
Locality: Table Mountain Zeolite occurrence, Squaw Mountain, Shadow Mts [1], San Bernardino Co., California, USA
Photo: © 2004 Jason B. Smith. Faujasite-Ca from Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
'Faujasite Subgroup'
Locality: Dish Hill Crater (Dish Hill; Siberia Hill; Siberia Hill Crater), Trojan, San Bernardino Co., California, USA
Fayalite
Formula: Fe2+2SiO4
Localities: Reported from at least 9 localities in this region.
Photo: © Saul Krotki 2002. Fayalite from Coso Hot Springs deposit, Coso Hot Springs, Coso District, Coso Mts, Inyo Co., California, USA
'Feldspar Group'
Localities: Reported from at least 151 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Feldspar Group from Himalaya Mine, Gem Hill, Mesa Grande District, San Diego Co., California, USA
'Feldspar Group var: Perthite'
Localities: Reported from at least 58 localities in this region.
'Felsite'
Locality: Lane Mountain Felsite deposit, Lane Mountain, San Bernardino Co., California, USA
Fencooperite (TL)
Formula: Ba6Fe3+3Si8O23(CO3)2Cl3 · H2O
Type Locality: Trumbull Peak Ba-silicate deposit, Trumbull Peak, Clearing House, Clearing House District, East Belt, Mariposa Co., California, USA
Habit: None
Colour: Black
Fluorescence: None
Reference: Canadian Mineralogist: 39(4): 1059
Localities: Recorded from at least 1 other locality in this region.
Photo: © Maurice de Graaf. Fencooperite from Trumbull Peak Ba-silicate deposit, Trumbull Peak, Clearing House, Clearing House District, East Belt, Mariposa Co., California, USA
Ferberite
Formula: FeWO4
Localities: Reported from at least 6 localities in this region.
Ferberite var: Reinite
Formula: FeWO4
Locality: Yaney Mine, Bishop, Bishop District (Tungsten Hills District), Inyo Co., California, USA
'Ferberite-Hübnerite Series'
Localities: Field Mine, Drum Peak, Vanderbilt District (New York District), New York Mts, San Bernardino Co., California, USA
Garvanza Mine (American Tungsten Mining and Refining Company; Carbonate Mine), Drum Peak, Vanderbilt District (New York District), New York Mts, San Bernardino Co., California, USA
Schloerb Mine (Shafer Mine; Schloerb and Field), Drum Peak, Vanderbilt District (New York District), New York Mts, San Bernardino Co., California, USA
'Fergusonite'
Localities: Southwest slope of Lawson Peak, Lawson Peak, Los Terrenitos, Laguna Mts, San Diego Co., California, USA
Unnamed REE pegmatite [1], Rainbow Wells, Marl Mts, San Bernardino Co., California, USA
Bird Rock claim (Bird Rock deposit; W. M. Keenan), Lawson Peak, Los Terrenitos, Laguna Mts, San Diego Co., California, USA
Unspecified REE occurrence, Box Springs Mts, Riverside Co., California, USA
Ferricopiapite
Formula: Fe5(SO4)6O(OH) · 20H2O
Locality: Coso Hot Springs deposit, Coso Hot Springs, Coso District (New Coso District), Coso Mts (Coso Range), Inyo Co., California, USA
'Ferrierite'
Localities: Reported from at least 6 localities in this region.
Ferrierite-K (TL)
Formula: (K2,Na2,Mg,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
Type Locality: Santa Monica Mts, Los Angeles/Ventura Co., California, USA
Reference: The Canadian Mineralogist Vol. 35, pp. 1571-1606 (1997)
Localities: Recorded from at least 6 other localities in this region.
Photo: © Dick Dionne. Ferrierite-K from Kanan Road, Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Ferrierite-Mg
Formula: (Mg,Na2,K2,Ca)3-5Mg[Al5-7Si27.5-31O72] · 18H2O
Locality: Kanan Road Quarry, Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Ferrimolybdite
Formula: Fe2(MoO4)3 · nH2O
Localities: Reported from at least 35 localities in this region.
Photo: © Philip Bluemner. Ferrimolybdite from Murdock Mine [2], Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Ferripyrophyllite
Formula: Fe3+Si2O5(OH)
Locality: Salt Spring Creek, Cloverdale area, Mendocino Co., California, USA
Ferrisicklerite
Formula: Li1-x(Fe3+xFe2+1-x)PO4
Locality: San Diego Co., California, USA
Photo: © 2004 Scott L. Ritchie. Ferrisicklerite from Cryo-Genie Mine, Warner Springs, Warner Springs District, San Diego Co., California, USA
Ferrisurite (TL)
Formula: (Pb,Ca)2.4Fe3+2(Si4O10)(CO3)1.7(OH)3 · nH2O
Type Locality: Shirley Ann group (Shirley Ann claim; Dodd Springs; Trail; Eureka; Sal; June; Bee Em Tee), Big Dodd Spring, Ubehebe District, Cottonwood Mts, Panamint Mts (Panamint Range), Inyo Co., California, USA
Reference: American Mineralogist (1992): 77: 1107-1111; Adams, P.M. (2001). "The Shirley Ann claim, Inyo County, California." Mineralogical Record: 32(5): 393-400.
Localities: Recorded from at least 1 other locality in this region.
Photo: © 2006 Jason B. Smith. Ferrisurite from Shirley Ann group, Big Dodd Spring, Ubehebe District, Cottonwood Mts, Panamint Mts, Inyo Co., California, USA
Ferro-actinolite
Formula: ☐{Ca2}{Fe2+5}(Si8O22)(OH)2
Localities: San Gabriel Mts, San Bernardino Co., California, USA
Madera Co., California, USA
Garnet Hill Mine (Rheona claim), Garnet Hill, Calaveras Co., California, USA
Tungsten Hills, Bishop District (Tungsten Hills District), Inyo Co., California, USA
Photo: © Van King. Ferro-actinolite from Tungsten Hills, Bishop District, Inyo Co., California, USA
'Ferro-Actinolite-Tremolite Series'
Localities: Reported from at least 24 localities in this region.
Photo: © Rock Currier. Ferro-Actinolite-Tremolite Series from Clear Creek, Fresno Co., California, USA
Ferroericssonite (TL)
Formula: BaFe2+2 Fe3+(Si2O7)O(OH)
Type Locality: Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Reference: Kampf, A.R., Roberts, A.C., Venance, K.E., Dunning, G.E., Robert E. Walstrom, R.E. (2011): Ferroericssonite, The Fe2+ analogue of ericssonite, from Eastern Fresno County, California, U.S.A. Canadian Mineralogist, 49, 587-594.
Localities: Recorded from at least 3 other localities in this region.
Photo: Ferroericssonite from Esquire No. 8 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Ferro-ferri-obertiite (TL)
Formula: NaNa2(Fe2+3Fe3+Ti)Si8O22O2
Type Locality: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Reference: IMA approvals - August 2009
'Ferro-ferri-taramite'
Formula: Na(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2
Locality: Pieta Creek area, Pieta, Mendocino Co., California, USA
Ferro-glaucophane
Formula: ◻[Na2][Fe2+3Al2]Si8O22(OH)2
Locality: Outlet Creek occurrence, North of Longvale, Longvale, Coastal Range, Mendocino Co., California, USA
Ferro-hornblende
Formula: ☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Localities: Reported from at least 6 localities in this region.
Photo: © 2008 by Jesse Crawford. Ferro-hornblende from San Benito Peak, San Benito Mountain Natural Area, New Idria District, Diablo Range, San Benito Co., California, USA
Ferrosaponite
Formula: Ca0.3(Fe2+,Mg,Fe3+)3((Si,Al)4O10)(OH)2 · 4H2O
Locality: Neuerberg locality 9, Cahuenga Boulevard roadcut, Cahuenga Pass, Hollywood, Hollywood Hills, Los Angeles, Santa Monica Mts, Los Angeles Co., California, USA - erroneously reported
Ferrosilite
Formula: FeSiO3
Locality: Mount Rubidoux, Rubidoux, Riverside Co., California, USA
Fersmite
Formula: (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6
Localities: Himalaya Mine (Himalaya dikes; Himalaya pegmatite), Gem Hill, Mesa Grande District, San Diego Co., California, USA
San Diego Mine (K. C. Naylor mine), Gem Hill, Mesa Grande District, San Diego Co., California, USA
Fibroferrite
Formula: Fe3+(SO4)(OH) · 5H2O
Localities: Reported from at least 8 localities in this region.
'Fine-grained ("volcanic") normal crystalline igneous rock'
Localities: Antimony Mine (Antimony group; Topaz Lead-Silver Mine), Topaz, Topaz Lake District, Mono Co., California, USA
Neal Group, Riverside Co., California, USA
Fizélyite ?
Formula: Ag5Pb14Sb21S48
Locality: Blue Light Mine (Harvey; Silverado; Dunlap Light Blue Mine), Silverado, Santa Ana Mts, Orange Co., California, USA
Photo: Fizélyite from Blue Light Mine, Silverado, Santa Ana Mts, Orange Co., California, USA
'Flint'
Localities: Flint Extension placer, Cool, El Dorado Co., California, USA
Flint group (Boston; Fourth of July; Monterey; Andy Johnson claim; Red Rock; Clear Creek), Hernandez, Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Florencite-(Nd) (TL)
Formula: NdAl3(PO4)2(OH)6
Type Locality: Sausalito Road Quarry, Sausalito, Marin Co., California, USA
Description: Occurs as brown, pulverulent and earthy material.
Reference: ; Milton, D.J. and Bastron, H. (1971). "Churchite and Florencite (Nd) from Sausalito, California." Mineralogical Record: 2(4): 166-168.
Fluoborite
Formula: Mg3(BO3)(F,OH)3
Localities: Ludlow (Stagg), San Bernardino Co., California, USA
New Method Mine (Hope Uranium prospect; Hope Mine; Hoping No. 1), Amboy area, Bristol Mts, San Bernardino Co., California, USA
Unnamed Skarn occurrence [1], Lakeshore, Fresno Co., California, USA
Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Photo: © 2009, JGW. Fluoborite from Ludlow, San Bernardino Co., California, USA
Fluocerite-(Ce)
Formula: (Ce,La)F3
Locality: Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Fluorapatite
Formula: Ca5(PO4)3F
Localities: Reported from at least 41 localities in this region.
Photo: © 2008 Jesse Fisher. Reproduction prohibited without prior permission. Fluorapatite from Himalaya Mine, Gem Hill, Mesa Grande District, San Diego Co., California, USA
Fluorapatite var: Carbonate-rich Fluorapatite
Formula: Ca5(PO4,CO3)3(F,O)
Localities: San Diego Co., California, USA
Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 and 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA
Unnamed Phosphate occurrence [1], Northeast Kern County, Kern Co., California, USA
Fluorapatite var: Mn-bearing Fluorapatite
Formula: (Ca,Mn2+)5(PO4)3(F,Cl,OH) or Ca5([P,Mn5+]O4)3(F,Cl,OH)
Locality: Green Lead Mine (Greenlead Mine), Fawnskin (Grout), Bear Valley District, San Bernardino Mts, San Bernardino Co., California, USA
Fluorapatite var: Strontian Apatite
Formula: (Ca,Sr)5(PO4)3F
Locality: Victor claim (Victor Mine), Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Fluorapophyllite-(K)
Formula: KCa4(Si8O20)(F,OH) · 8H2O
Localities: Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 and 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA
Coyote Peak, Coastal Range, Humboldt Co., California, USA
Fluor-elbaite
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3F
Locality: Himalaya Mine (Himalaya dikes; Himalaya pegmatite), Gem Hill, Mesa Grande District, San Diego Co., California, USA
Fluorellestadite (TL)
Formula: Ca5(SiO4)1.5(SO4)1.5F
Type Locality: Crestmore quarries, Crestmore, Riverside Co., California, USA
Reference: Eakle, A.S. & A.F. Rogers (1914), Wilkeite, a new mineral of the apatite group, and okenite, its alteration product, from southern California, Am. Jour. Sci., 4th. Series: 37: 262-267.
Localities: Recorded from at least 5 other localities in this region.
Photo: © C & C Forrester. Fluorellestadite from Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Fluorellestadite var: Wilkeite (FRL)
Formula: Ca5(SiO4)1.5(SO4)1.5F
Type Locality: Crestmore quarries, Crestmore, Riverside Co., California, USA
Reference: Eakle, A.S. & A.F. Rogers (1914), Wilkeite, a new mineral of the apatite group, and okenite, its alteration product, from southern California, Am. Jour. Sci., 4th. Series: 37: 262-267.
Fluorite
Formula: CaF2
Localities: Reported from at least 114 localities in this region.
Photo: © Dan & Diana Weinrich Minerals. Fluorite from Felix Mine, Azusa, San Gabriel Mts, Los Angeles Co., California, USA
Fluornatromicrolite
Formula: (Na1.5Bi0.5)Ta2O6F
Locality: Cryo-Genie Mine (Cindy B-Cryogenie claim; Lost Valley Truck Trail prospect), Warner Springs, Warner Springs District, San Diego Co., California, USA
Photo: Fluornatromicrolite from Cryo-Genie Mine, Warner Springs, Warner Springs District, San Diego Co., California, USA
Fluoro-richterite
Formula: {Na}{CaNa}{Mg5}(Si8O22)(F,OH)2
Locality: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Fluorphosphohedyphane (TL)
Formula: Ca2Pb3(PO4)3F
Type Locality: Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Habit: Hexagonal crystals elongated along the C-axis.
Colour: Clear to white.
Reference: Kampf, A.R. & Housley, R.M. (2011): Fluorphosphohedyphane, Ca2Pb3(PO4)3F, the first apatite supergroup mineral with essential Pb and F. American Mineralogist, 96, 423-429.
Photo: © Brent Thorne 2010. Fluorphosphohedyphane from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Fluorstrophite
Formula: SrCaSr3(PO4)3F
Locality: Victor claim (Victor Mine), Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Foitite (TL)
Formula: (□,Na)(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OH
Type Locality: California, USA
Reference: Am.Min. (1993): 78: 1299.
Localities: Recorded from at least 5 other localities in this region.
Photo: © California Institute of Technology. Foitite from Schindler Mine, Little Cahuilla Mountain, Cahuilla District, Riverside Co., California, USA
Fornacite
Formula: Pb2Cu(CrO4)(AsO4)(OH)
Localities: Reported from at least 7 localities in this region.
Photo: © Daniel Evanich 2017. Fornacite from Santa Rosa Mine, Malpais Mesa, Inyo Mts, Inyo Co., California, USA
Forsterite
Formula: Mg2SiO4
Localities: Reported from at least 20 localities in this region.
Photo: © g.slak 2008. Forsterite from Cascade Canyon, San Gabriel Mts, San Bernardino Co., California, USA
Forsterite var: Peridot
Formula: Mg2SiO4
Locality: Picacho District, Chocolate Mts, Imperial Co., California, USA
Foshagite (TL)
Formula: Ca4(Si3O9)(OH)2
Type Locality: Crestmore quarries, Crestmore, Riverside Co., California, USA
Reference: Eakle, Arthur Starr (1925a), Foshagite, a new silicate from Crestmore, California: American Mineralogist: 10: 97-99.
Localities: Recorded from at least 1 other locality in this region.
Photo: © Paul Bongaerts. Foshagite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Fraipontite
Formula: (Zn,Al)3((Si,Al)2O5)(OH)4
Localities: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
War Eagle Mine, Shoshone Mines (Shoshone Mines group; Shoshone Mine group; Grant Mine; Mabel Mine; Black Prince Mine), Upper Noonday Camp, Nopah Range, Inyo Co., California, USA
Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © Brent Thorne. Fraipontite from War Eagle Mine, Shoshone Mines, Upper Noonday Camp, Nopah Range, Inyo Co., California, USA
Franciscanite (TL)
Formula: Mn2+6(V5+,☐)2(SiO4)2(O,OH)6
Type Locality: Pennsylvania Mine, San Antonio Valley, Mount Hamilton, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
Reference: Amer.Min.(1986) 71, 1522-1526; www.mineralsocal.org
Photo: © Rruff Project. Franciscanite from Pennsylvania Mine, San Antonio Valley, Mount Hamilton, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
Franckeite
Formula: Fe2+(Pb,Sn2+)6Sn4+2Sb2S14
Localities: Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
Darwin Mines (Darwin group; Defiance; Driver; Independence; Lane; Liberty; Lucky Jim; Southwest and Thompson; Bernon; Rip Van Winkle; Mexicanus Colorado Inc.), Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Thompson Mine, Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Photo: © mwminerals.com. Franckeite from Pacific Limestone Products Quarry, Santa Cruz, Santa Cruz Co., California, USA
Frankhawthorneite
Formula: Cu2Te6+O4(OH)2
Locality: Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © Jerry A. Baird. Frankhawthorneite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Franklinite
Formula: Zn2+Fe3+2O4
Localities: Bumper group, Chemehuevi Mts, San Bernardino Co., California, USA
Desert View Mine, Fawnskin (Grout), Bear Valley District, San Bernardino Mts, San Bernardino Co., California, USA
Freibergite
Formula: Ag6[Cu4Fe2]Sb4S13-x
Localities: Reported from at least 14 localities in this region.
Photo: Freibergite from Advance Mine, Colorado Hill, Loope, Monitor - Mogul District, Alpine Co., California, USA
'Freibergite-Tetrahedrite Series'
Locality: Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Fresnoite (TL)
Formula: Ba2Ti(Si2O7)O
Type Locality: Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Colour: Yellow
Description: Occurs as grains from 0.1 mm or less to 3 mm in size with the average at about 0.3 mm. Occurs in quartzite or quartz-sanbornite rock, associated with celsian, titantaramellite, diopside and pyrrhotite.
Reference: [Amer.Min.(1965) 50, 314-340; MinRec 33:161]; American Mineralogist (1981), Volume 66, pages 1050-1053; Canadian Mineralogist (2001): 39:1053-1058.
Localities: Recorded from at least 9 other localities in this region.
Photo: © Rob Lavinsky & irocks.com. Fresnoite from Junnila Mine, New Idria District, Diablo Range, San Benito Co., California, USA
Friedrichite
Formula: Pb5Cu5Bi7S18
Locality: St. Charles Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Frondelite
Formula: Mn2+Fe3+4(PO4)3(OH)5
Locality: Pack Rat Mine, Tule Mountain (Mount Tule; Tulley Mountain), Jacumba, Jacumba District, San Diego Co., California, USA
Fuettererite (TL)
Formula: Pb3Cu2+6Te6+O6(OH)7Cl5
Type Locality: NE2 vein, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Reference: Kampf, A.R., Mills, S.J., Housley, R.M. and Marty, J. (2012) Fuettererite, IMA 2011-111. CNMNC Newsletter No. 13, June 2012, page 811; Mineralogical Magazine, 76, 807-817.; Kampf, A.R., Mills, S.J., Housley, R.M., Marty, J. (2013): Lead-tellurium oxysalts from Otto Mountain near Baker, California: VIII. Fuettererite, Pb3Cu2+6Te6+O6(OH)7Cl5, a new mineral with double spangolite-type sheets. American Mineralogist, 98, 506–511.; Housley R., pers.comm., May 2017
Localities: Recorded from at least 1 other locality in this region.
Photo: © Chuck Adan 2013. Fuettererite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
'Fulgurite'
Formula: SiO2
Localities: Riverside Co., California, USA
Lake Isabella, Kernville, Cove District, Kern Co., California, USA
Placer Co., California, USA
Photo: © Permission given to mindat.org to display. Fulgurite from Placer Co., California, USA
'Gabbro'
Localities: Unnamed Silica occurrence [3] (Unnamed Quartz occurrence), Calico, Calico District (Daggett District; Calico-Daggett area), Calico Mts (Calico Hills), San Bernardino Co., California, USA
Unnamed Prospect (MRDS - 10077137), Riverside Co., California, USA
Pala orbicular gabbro deposit, Vanderberg Mine (MS 5391; Naylor Rock; Naylor-Vanderburg mine; Sickler group; Vandenburg mine; Vanderburg mine), Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill), Pala, Pala District, San Diego Co., California, USA
Unnamed Hornblende Gabbro occurrence [1], Woodlake, Tulare Co., California, USA
Gabbro Peak, Castle Peak District, Mono Co., California, USA
Gageite
Formula: Mn21(Si4O12)2O3(OH)20
Localities: Pennsylvania Mine, San Antonio Valley, Mount Hamilton, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
Heath Canyon occurrences, Wrightwood, San Gabriel Mts, San Bernardino Co., California, USA
Buckeye Mine (Buckeye Mines; Wright Mine), Mount Oso, Ladd-Buckeye District, Diablo Range, Stanislaus Co., California, USA
Photo: © Arliguie M. Gageite from Pennsylvania Mine, San Antonio Valley, Mount Hamilton, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
Gahnite
Formula: ZnAl2O4
Localities: Crestmore quarries, Crestmore, Riverside Co., California, USA
Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Himalaya Mine (Himalaya dikes; Himalaya pegmatite), Gem Hill, Mesa Grande District, San Diego Co., California, USA
Good View Mine (Goodview Mine; Copper King claim; Copper King and M. S. Mine; Little Giant claim; Stonewall Jackson claim; Crown Point claim; San Jose claim; Rothschild claim; S. A. claim; Sunset claim), Green Mountain, Green Mountain District (Ben Hur District), Mariposa Co., California, USA
Mack Mine (John Mac mine; Mac mine; San Luis Rey claim), Rincon Mountain, Rincon, Rincon District, San Diego Co., California, USA ? (more information)
Galeite (TL)
Formula: Na15(SO4)5F4Cl
Type Locality: Searles Lake, San Bernardino Co., California, USA
Reference: American Mineralogist (1963): 48: 485; Pabst, Adolf, Dwight L. Sawyer, Jr. & George S. Switzer (1955), Galeite, a new mineral from Searles Lake, California (abstract): Geological Society of America: 66: 1658; Pabst, Adolf, Dwight L. Sawyer, Jr. & George S. Switzer (1963), Galeite and related phases in the system Na2SO4.NaF.NaCl: American Mineralogist: 48: 485; Smith, George Irving & D.V. Haines (1964), Character and distribution of nonclastic minerals in the Searles Lake evaporite deposit, California: USGS Bulletin 1181-P: 27; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 281.
Photo: © 2007, JGW, courtesy of Photographic Guide to Mineral Species. Galeite from Searles Lake, San Bernardino Co., California, USA
Galena
Formula: PbS
Localities: Reported from at least 696 localities in this region.
Photo: Galena from Ural Fraction Code Mine, Nevada City, Nevada City District, Nevada Co., California, USA
Galena var: Argentiferous Galena
Formula: PbS
Localities: Reported from at least 27 localities in this region.
Photo: © Daniel Evanich. Argentiferous Galena from Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Galenobismutite
Formula: PbBi2S4
Localities: Lucky Lucy Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
St. Charles Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
'Ganister'
Localities: Hoff Ganister Fire Brick Company (Hoff Canister Fire Brick Company), Riverside Co., California, USA
Atlas Fire Brick Company Ganister Mine (Kennedy), Hodge, San Bernardino Co., California, USA
Ganomalite ?
Formula: Pb9Ca5Mn(Si2O7)4(SiO4)O
Localities: Crestmore quarries, Crestmore, Riverside Co., California, USA ? (more information)
Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA ? (more information)
Ganophyllite
Formula: (K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
Locality: Alum Rock Park, East Foothills, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
'Garnet'
Formula: X3Z2(SiO4)3
Localities: Reported from at least 318 localities in this region.
Photo: © Christopher N. Wentzell. Garnet from Hiriart Mine, Hiriart Mountain, Pala, Pala District, San Diego Co., California, USA
'Garnierite'
Localities: Reported from at least 13 localities in this region.
Garrelsite
Formula: Ba3NaSi2B7O16(OH)4
Localities: Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Gaylussite
Formula: Na2Ca(CO3)2 · 5H2O
Localities: Reported from at least 8 localities in this region.
Photo: © 2008 by Jesse Crawford. Gaylussite from Searles Lake, San Bernardino Co., California, USA
Geffroyite
Formula: (Cu,Fe,Ag)9(Se,S)8
Locality: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Gehlenite
Formula: Ca2Al(AlSiO7)
Localities: Reported from at least 6 localities in this region.
Photo: © 2017 by Jesse Crawford All roghts reserved. Gehlenite from Paraspurrite type locality, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Geikielite
Formula: MgTiO3
Localities: Jensen Quarry (Oak Quarry), Jurupa, Jurupa Mts, Riverside Co., California, USA
Magnesian Marble occurrence(s), Slates Hot Springs, Santa Lucia Mts (Santa Lucia Range), Monterey Co., California, USA
Chino Quarry, Chino Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Geocronite
Formula: Pb14(Sb,As)6S23
Localities: Eclipse Mine, Mazourka Canyon, Tibbetts District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Garibaldi Mine, Prescott area, Mono Co., California, USA
Santa Maria Mine (Santa Maria claim), Cerro Gordo Mine, Cerro Gordo, Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Darwin District, Darwin Hills, Inyo Co., California, USA
Gersdorffite
Formula: NiAsS
Localities: Reported from at least 8 localities in this region.
Gerstleyite (TL)
Formula: Na2(Sb,As)8S13 · 2H2O
Type Locality: Baker Mine, U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Reference: American Mineralogist 41 (1956), 839-843
Localities: Recorded from at least 5 other localities in this region.
Photo: © Rob Lavinsky & irocks.com. Gerstleyite from Baker Mine, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Gianellaite
Formula: [(NHg2)2](SO4)(H2O)x
Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Gibbsite
Formula: Al(OH)3
Localities: Alberhill Clay pits (Alberhill Coal & Clay Company deposit), Alberhill, Temescal Valley, Riverside Co., California, USA
Tejon Ranch occurrences, Lebec, Gorman District, Tehachapi Mts, Kern Co., California, USA
Gillespite
Formula: BaFe2+Si4O10
Localities: Trumbull Peak Ba-silicate deposit, Trumbull Peak, Clearing House, Clearing House District, East Belt, Mariposa Co., California, USA
Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Esquire No. 8 claim (Lander's Gillespite locality), Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Baumann prospect (Bauman Ranch), Dumtah, Tulare Co., California, USA
Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Photo: © 2008 Peter Cristofono. Gillespite from Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Ginorite
Formula: Ca2B14O20(OH)6 · 5H2O
Localities: Hard Scramble claim, Ryan, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
South Meridian claim, Twenty Mule Team Canyon, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
Mott prospect (Mott Colemanite prospect; Mott open cut), Twenty Mule Team Canyon, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
East Coleman Mine, Furnace Creek, Death Valley, Inyo Co., California, USA
Photo: © Simone Citon. Ginorite from East Coleman Mine, Furnace Creek, Death Valley, Inyo Co., California, USA
'Glass'
Locality: Los Angeles Martian meteorite, Los Angeles Co., California, USA
'Glassy rock'
Locality: Glassy Rock Perlite Mine (Rust), Bristol Mts, San Bernardino Co., California, USA
Glauberite
Formula: Na2Ca(SO4)2
Localities: Reported from at least 8 localities in this region.
Photo: © Łukasz Kruszewski (2007). Glauberite from Searles Lake, San Bernardino Co., California, USA
Glauconite
Formula: (K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2
Localities: Reported from at least 8 localities in this region.
Glaucophane
Formula: ◻[Na2][Mg3Al2]Si8O22(OH)2
Localities: Reported from at least 65 localities in this region.
Photo: © Karl Volkman 04/05. Glaucophane from Sonoma Co., California, USA
'Gmelinite'
Localities: U.S. Borax open pit (Boron pit), U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Photo: © Dick Dionne. Gmelinite from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Gmelinite-Na
Formula: Na4(Si8Al4O24] · 11H2O
Locality: U.S. Borax open pit (Boron pit), U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Photo: © Kelly Starnes. Gmelinite-Na from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
'Gneiss'
Localities: Reported from at least 55 localities in this region.
Goethite
Formula: α-Fe3+O(OH)
Localities: Reported from at least 63 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Goethite from Elizabeth R. Mine, Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Gold
Formula: Au
Localities: Reported from at least 7796 localities in this region.
Photo: © J.Ralph 2008. Gold from Colorado Mine, Colorado, Colorado District, Whitlock District, Bagby-Mariposa-Mount Bullion-Whitlock District, Mother Lode Belt, Mariposa Co., California, USA
'Gold Amalgam'
Localities: Unspecified Mariposa area occurrences, Mariposa, Bagby-Mariposa-Mount Bullion-Whitlock District, Mother Lode Belt, Mariposa Co., California, USA
Odin Mine (Odin Drift Mine), Nevada City, Nevada City District, Nevada Co., California, USA
'Goldamalgam (of Chen et al.)'
Formula: (Au,Ag)Hg
Locality: Merced River, Mariposa Co., California, USA
Goldfieldite
Formula: Cu10Te4S13
Localities: Pittsburg-Liberty Mine (Pittsburg claim; Pittsburg No. 2 claim; Liberty claim; Liberty No. 2 claim), New York Hill, Masonic District, Bodie Hills, Mono Co., California, USA
Serita Mine, New York Hill, Masonic District, Bodie Hills, Mono Co., California, USA
Morning Star Mine (Curtz Mine; Ardis Mine), Mogul Peak, Monitor - Mogul District, Alpine Co., California, USA
Photo: Goldfieldite from Pittsburg-Liberty Mine, New York Hill, Masonic District, Bodie Hills, Mono Co., California, USA
'Gold ore'
Locality: Gold Ore No. 2 prospect, Plaskett, Los Burros District, Santa Lucia Mts (Santa Lucia Range), Monterey Co., California, USA
Gonnardite
Formula: (Na,Ca)2(Si,Al)5O10 · 3H2O
Localities: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Goosecreekite
Formula: Ca[Al2Si6O16] · 5H2O
Locality: Jensen Quarry (Oak Quarry), Jurupa, Jurupa Mts, Riverside Co., California, USA
Goslarite
Formula: ZnSO4 · 7H2O
Localities: Darwin District, Darwin Hills, Inyo Co., California, USA
Island Mountain Mine (Dahrman group; Island Mountain Consolidated Mine; Annex; Leach; Merritt Gore; Shotgun), Moose Peak, Island Mountain, Coastal Range, Trinity Co., California, USA
Blackhawk Mine, Millersville, Loraine District, Kern Co., California, USA
Bully Hill District (Winthrop District), East Shasta Copper - Zinc District, Klamath Mts, Shasta Co., California, USA
Jackass Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Gowerite (TL)
Formula: Ca[B5O8(OH)][B(OH)3] · 3H2O
Type Locality: Hard Scramble claim, Ryan, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
Reference: Erd, R.C., J.F. McAllister & H. Almond (1959), Gowerite, a new hydrous calcium borate from Death Valley, California: American Mineralogist: 44: 911-919; Erd, R.C., J.F. McAllister, and A.C. Vlisidis (1970) Wardsmithite 5CaO • MgO •12B2O3 •30H2O, a new borate mineral from the Death Valley region, California. American Mineralogist: 55: 349-357.
Localities: Recorded from at least 8 other localities in this region.
Photo: © Elmar Lackner 2009. Gowerite from Hard Scramble claim, Ryan, Furnace Creek District, Inyo Co., California, USA
Goyazite
Formula: SrAl3(PO4)(PO3OH)(OH)6
Locality: Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 and 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA
Photo: © Mineralogical Reserach Co.. Goyazite from Champion Mine, White Mountain Peak, White Mts, Mono Co., California, USA
'Granite'
Localities: Reported from at least 102 localities in this region.
'Granitic gneiss'
Localities: Reported from at least 6 localities in this region.
'Granitoid'
Localities: Shamrock Mine, Havilah, Clear Creek District, Kern Co., California, USA
Chuckwalla Wash prospect, Bannock, Ibex District, Sacramento Mts, San Bernardino Co., California, USA
Lester Mine, Fort Irwin, San Bernardino Co., California, USA
'Granodiorite'
Localities: American Flag Mine, Hodges, Riverside Co., California, USA
Black Mountain claims (Gallagher), Klinefelter, Dead Mts (Black Mountains; Tuuhavitci; Yuvisaavitc), San Bernardino Co., California, USA
'Granulite'
Locality: Declezville Granulite Mine (Declez; Declezville), Fontana (Rosena), San Bernardino Co., California, USA
Graphite
Formula: C
Localities: Reported from at least 120 localities in this region.
Photo: © John A. Jaszczak. All rights reserved.. Graphite from Crestmore, Riverside Co., California, USA
Greenockite
Formula: CdS
Localities: Reported from at least 11 localities in this region.
Photo: © Rruff Project. Greenockite from Mono Co., California, USA
'Greenstone'
Localities: Reported from at least 8 localities in this region.
Greigite (TL)
Formula: Fe2+Fe3+2S4
Type Locality: Four Corners No. 3; 4 & 5 wells, Kramer Junction (Beecher's Corners; Beechers Corners; Four Corners), East Kramer Borate area (East Kramer Colemanite area), East Kramer District, San Bernardino Co., California, USA
Description: Found in drill cores in lake beds.
Reference: American Mineralogist (1974): 49: 543-555.
Localities: Recorded from at least 7 other localities in this region.
Grossular
Formula: Ca3Al2(SiO4)3
Localities: Reported from at least 69 localities in this region.
Photo: © Dan & Diana Weinrich Minerals. Grossular from Volcano, Volcano District, Amador Co., California, USA
Grossular var: Hessonite
Formula: Ca3Al2(SiO4)3
Localities: Reported from at least 14 localities in this region.
Grossular var: Magnesian Grossular
Formula: Ca3Al2(SiO4)3
Localities: Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill), Pala, Pala District, San Diego Co., California, USA
Tourmaline King Mine (Gem claim; King mine; MS 4500; MS 4926; Schuyler mine; Wilke mine), Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Grossular var: Plazolite
Formula: Ca3Al2(SiO4)3
Localities: Crestmore, Riverside Co., California, USA
Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Photo: © California Institute of Technology. Plazolite from Crestmore quarries, Crestmore, Riverside Co., California, USA
'Grossular-Hibschite Series'
Localities: Reported from at least 7 localities in this region.
Grunerite
Formula: ☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2
Localities: Laytonville Quarry (Longvale; Longvale Quarry), Laytonville, Coastal Range, Mendocino Co., California, USA
Ward Creek (1), Cazadero, Coast Range, Sonoma Co., California, USA
Panoche Pass, Diablo Range, San Benito Co., California, USA
Guanajuatite
Formula: Bi2Se3
Localities: Darwin District, Darwin Hills, Inyo Co., California, USA
Darwin Mines (Darwin group; Defiance; Driver; Independence; Lane; Liberty; Lucky Jim; Southwest and Thompson; Bernon; Rip Van Winkle; Mexicanus Colorado Inc.), Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Thompson Mine, Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
'Gummite'
Localities: Reported from at least 8 localities in this region.
Gustavite
Formula: AgPbBi3S6
Localities: Darwin District, Darwin Hills, Inyo Co., California, USA
St. Charles Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Lucky Lucy Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Gypsum
Formula: CaSO4 · 2H2O
Localities: Reported from at least 293 localities in this region.
Photo: © Russell G. Rizzo & Cal Neva Mineral Company. Gypsum from Point Sal, Guadalupe, Santa Barbara Co., California, USA
Gypsum var: Alabaster
Formula: CaSO4 · 2H2O
Localities: Mint Canyon deposit (Lang; Los Angeles Gypsum), Mint Canyon, Mint Canyon [town], Los Angeles Co., California, USA
Unnamed Gypsum occurrence (2), Santa Barbara Creek, San Rafael Mts, Santa Barbara Co., California, USA
Gypsum var: Satin Spar Gypsum
Formula: CaSO4 · 2H2O
Localities: Reported from at least 6 localities in this region.
Gypsum var: Selenite
Formula: CaSO4 · 2H2O
Localities: Reported from at least 20 localities in this region.
Photo: © 2002 John H. Betts. Selenite from Searles Lake, San Bernardino Co., California, USA
Gyrolite
Formula: NaCa16Si23AlO60(OH)8 · 14H2O
Localities: Crestmore quarries, Crestmore, Riverside Co., California, USA
Fort Point, San Francisco, San Francisco Co., California, USA
Cold Creek Canyon, Santa Monica Mts, Los Angeles Co., California, USA
New Almaden Mine (New Almaden Mines), Almaden Quicksilver County Park, New Almaden, New Almaden District, Santa Cruz Mts, Santa Clara Co., California, USA
Photo: © 2007, JGW, courtesy of Photographic Guide to Mineral Species. Gyrolite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Haiweeite (TL)
Formula: Ca(UO2)2[Si5O12(OH)2] · 6H2O
Type Locality: Unnamed U occurrence [1], Coso District (New Coso District), Coso Mts (Coso Range), Inyo Co., California, USA
Description: Occurs as spherulitic aggregates on fracture surfaces in granite.
Reference: McBurney, Thomas Chester & Joseph Murdoch (1959), Haiweeite a new uranium mineral from California: American Mineralogist: 44: 839-843; Outerbridge, W.F., et al (1960), Weeksite, a new uranium silicate from the Thomas Range, Juab County, Utah, American Mineralogist: 45: 39-52; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 517.
Photo: Haiweeite from Unnamed U occurrence [1], Coso District, Coso Mts, Inyo Co., California, USA
Halite
Formula: NaCl
Localities: Reported from at least 54 localities in this region.
Photo: © Rock Currier. Halite from Searles Lake, San Bernardino Co., California, USA
'Halloysite'
Formula: Al2(Si2O5)(OH)4
Localities: Reported from at least 8 localities in this region.
Halloysite-10Å
Formula: Al2Si2O5(OH)4 · 2H2O
Localities: Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Toga Mine (Pacific Tungsten Company Mine), Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Halotrichite
Formula: FeAl2(SO4)4 · 22H2O
Localities: Reported from at least 23 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Halotrichite from Golden Queen Mine, Soledad Mountain project, Soledad Mountain deposit, Soledad Mountain, Mojave, Mojave-Rosamond District, Kern Co., California, USA
Hambergite
Formula: Be2(BO3)(OH)
Localities: Little Three Mine (Little 3 mine), Ramona, Ramona District, San Diego Co., California, USA
Himalaya Mine (Himalaya dikes; Himalaya pegmatite), Gem Hill, Mesa Grande District, San Diego Co., California, USA
Jensen Quarry (Oak Quarry), Jurupa, Jurupa Mts, Riverside Co., California, USA
San Pedro Mine (Pedro mine), Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill), Pala, Pala District, San Diego Co., California, USA
Photo: © Rob Lavinsky & irocks.com. Hambergite from Himalaya Mine, Gem Hill, Mesa Grande District, San Diego Co., California, USA
Hanawaltite (TL)
Formula: (Hg2+2)3Hg2+(Cl,OH)2O3
Type Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Reference: Mineralogical Record: 27: 463; Canadian Mineralogist: 34: 61-72.
Hanksite (TL)
Formula: Na22K(SO4)9(CO3)2Cl
Type Locality: Searles Lake, San Bernardino Co., California, USA
Description: Occurs as euhedral crystals principally in the upper salt in beds to 5 feet (1.5 meters) thick. Crystals 5 - 30 mm long and to 150 mm.
Reference: American Journal of Science (1885), ser. 3, 30, 133-135; Hidden, William Earl (1885), On hanksite, a new anhydrous sulphate-carbonate of sodium from San Bernardino County, California: New York Academy of Science Annals: 3: 230-241; Hanks, Henry Garber (1889), On the occurrence of hanksite in California: American Journal of Science, 3rd. series: 37: 63; Smith, George Irving & D.V. Haines (1964), Character and distribution of nonclastic minerals in the Searles Lake evaporite deposit, California: USGS Bulletin 1181-P: 16-18; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 284; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 549, 629; Mineralogical Record (2007): 38: 213.; Gale, Hoyt Stoddard (1915), Mineralogy of the Searles Lake deposits in Salines in the Owens, Searles, and Panamint basins, southeastern California: USGS Bulletin 580: 296-308
Localities: Recorded from at least 7 other localities in this region.
Photo: Hanksite from Trona Mine, Trona, Argus District, Argus Range, San Bernardino Co., California, USA
Hardystonite
Formula: Ca2Zn(Si2O7)
Locality: Desert View Mine, Fawnskin (Grout), Bear Valley District, San Bernardino Mts, San Bernardino Co., California, USA
Photo: © Earl Verbeek. Hardystonite from Desert View Mine, Fawnskin, Bear Valley District, San Bernardino Mts, San Bernardino Co., California, USA
Harkerite
Formula: Ca12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2O
Locality: Crestmore quarries, Crestmore, Riverside Co., California, USA
Harmotome
Formula: (Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] · 12H2O
Localities: Pennsylvania Mine, San Antonio Valley, Mount Hamilton, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
Santa Monica Mts, Los Angeles/Ventura Co., California, USA
Hastingsite
Formula: {Na}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(OH)2
Localities: Mount Rubidoux, Rubidoux, Riverside Co., California, USA
Unnamed Amphibole occurrence (1), Bidwell Bar, Butte Co., California, USA
Pine Creek Mine (Black Monster Mine; Snow Queen Mine; Pine Creek Tungsten Mine & mill; Pine Creek apt plant; Pine Creek custom mill), Scheelite, Bishop District (Tungsten Hills District), Inyo Co., California, USA
Unnamed diorite pegmatite [1], Fort Irwin, San Bernardino Co., California, USA
Hausmannite
Formula: Mn2+Mn3+2O4
Localities: Reported from at least 22 localities in this region.
Photo: © 2016, JGW. Hausmannite from Alum Rock Park, East Foothills, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
Haüyne
Formula: (Na,K)3(Ca,Na)(Al3Si3O12)(SO4,S,Cl)
Localities: Cascade Canyon, San Gabriel Mts, San Bernardino Co., California, USA
Lazurite occurrence, San Antonio Creek, San Antonio Canyon, San Gabriel Mts, Los Angeles Co., California, USA
Unnamed Lazurite occurrence [1], Stoddard Peak, San Gabriel Mts, San Bernardino Co., California, USA
Big Horn Mine [2] (Bighorn Mine; Lapis Lazuli deposit), Stoddard Peak, San Gabriel Mts, San Bernardino Co., California, USA ? (more information)
Ontario Peak, San Gabriel Mts, San Bernardino Co., California, USA (more information)
Hawleyite
Formula: CdS
Locality: Crestmore quarries, Crestmore, Riverside Co., California, USA
Photo: © Roberto Bosi. Hawleyite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Haxonite
Formula: (Fe,Ni)23C6
Locality: Goose Lake meteorite, Goose Lake, Modoc Co., California, USA
Hazenite (TL)
Formula: KNaMg2(PO4)2 · 14H2O
Type Locality: South shore, Mono Lake, Mono Co., California, USA
Reference: Yang, H., Sun, H. J. and Downs, R. T. (2011): Hazenite, KNaMg2(PO4)2·14H2O, a new biologically related phosphate mineral, from Mono Lake, California, U.S.A. American Mineralogist, 96:675–681.
Photo: © Roy Kristiansen. Hazenite from South shore, Mono Lake, Mono Co., California, USA
Heazlewoodite
Formula: Ni3S2
Localities: Burro Mountain ultramafic complex, Burro Mountain, Los Burros District, Santa Lucia Mts (Santa Lucia Range), Monterey Co., California, USA
Dorleska Mine, Preachers Peak, Klamath Mts, Trinity Co., California, USA
Union Carbide Mine (Union Carbide Nuclear Mine), Condon Peak, New Idria District, Diablo Range, Fresno Co., California, USA
Unnamed Ni occurrence [1], Archer Camp, New Idria District, Diablo Range, Fresno Co., California, USA
Hectorite (TL)
Formula: Na0.3(Mg,Li)3(Si4O10)(F,OH)2
Type Locality: Hector Bentonite Mine No. 1 (Company No. 1 Mine; Hector Mine), Hector, Cady Mts, San Bernardino Co., California, USA
Reference: American Mineralogist (1936): 21: 238-244; Wright, L.A., et al (1953), Mines and mineral resources of San Bernardino County, California: California Journal of Mines and Geology, California Division of Mines (Report 49): 49(1-2): 157-161; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 440.
Localities: Recorded from at least 6 other localities in this region.
Photo: © California Institute of Technology. Hectorite from Hector, San Bernardino Co., California, USA
Hedenbergite
Formula: CaFe2+Si2O6
Localities: Reported from at least 12 localities in this region.
Hedyphane
Formula: Ca2Pb3(AsO4)3Cl
Localities: Bagdad-Chase Mine (Barstow mill; Camp Rochester; Pacific Mine; Pacific Mines; Roosevelt Consolidated Mine; Buckeye-Stedman-Bagdad Chase Mine), Stedman, Stedman District (Ludlow; Rochester; Buckeye), Bullion Mts (Bullion Range), San Bernardino Co., California, USA
Reward Mine (Brown Monster Mine; Ruth; Hirsch and Telescope group; Brown Monster-Reward; Graham-Jones; Eclipse; Golden West claims; Hidden Treasure group; F. D. Roosevelt claims), Reward, Russ District, Inyo Mts (Inyo Range), Inyo Co., California, USA
'Hellandite'
Locality: Jensen Quarry (Oak Quarry), Jurupa, Jurupa Mts, Riverside Co., California, USA
Helvine
Formula: Be3Mn2+4(SiO4)3S
Localities: Pack Rat Mine, Tule Mountain (Mount Tule; Tulley Mountain), Jacumba, Jacumba District, San Diego Co., California, USA
Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Clark Mine, Rincon Mountain, Rincon, Rincon District, San Diego Co., California, USA
Gem Star Mine (Gem Lepidolite mine; Labaugh mine; Loughbaugh mine), Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Katerina Mine (Ashley mine; Caterina mine; Catherin mine; Catherina mine; Katrina mine), Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill), Pala, Pala District, San Diego Co., California, USA
Photo: © Jasun McAvoy & mineralman.com. Helvine from Clark Mine, Rincon Mountain, Rincon, Rincon District, San Diego Co., California, USA
Hematite
Formula: Fe2O3
Localities: Reported from at least 278 localities in this region.
Photo: © Jay Buscio. Hematite from Pioneer-Lilyama Mine, Pilot Hill, Pilot Hill District, El Dorado Co., California, USA
Hematite var: Martite
Formula: Fe2O3
Locality: Desert Gold Claims, Whitewater, Riverside Co., California, USA
Hemimorphite
Formula: Zn4Si2O7(OH)2 · H2O
Localities: Reported from at least 39 localities in this region.
Photo: © 2003 Doug Merson. Hemimorphite from Lead Mountain Mine, Lead Mountain [2], Barstow, Barstow District, San Bernardino Co., California, USA
Hercynite
Formula: Fe2+Al2O4
Localities: Reported from at least 9 localities in this region.
Photo: © 2008, JGW. Hercynite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Hercynite var: Picotite
Formula: (Fe,Mg)(Al,Cr)2O4
Localities: Reported from at least 6 localities in this region.
Herderite
Formula: CaBePO4(F,OH)
Localities: Cryo-Genie Mine (Cindy B-Cryogenie claim; Lost Valley Truck Trail prospect), Warner Springs, Warner Springs District, San Diego Co., California, USA
Himalaya Mine (Himalaya dikes; Himalaya pegmatite), Gem Hill, Mesa Grande District, San Diego Co., California, USA
Blue Chihuahua Mine (Blue Dog), Iron Spring Mountain, Cooper Canyon District, Riverside Co., California, USA (more information)
Beebe Hole Mine, Tule Mountain (Mount Tule; Tulley Mountain), Jacumba, Jacumba District, San Diego Co., California, USA (more information)
Pack Rat Mine, Tule Mountain (Mount Tule; Tulley Mountain), Jacumba, Jacumba District, San Diego Co., California, USA (more information)
Photo: © Rock Currier. Herderite from Blue Chihuahua Mine, Iron Spring Mountain, Cooper Canyon District, Riverside Co., California, USA
'Herderite-Hydroxylherderite Series'
Locality: Himalaya Mine (Himalaya dikes; Himalaya pegmatite), Gem Hill, Mesa Grande District, San Diego Co., California, USA
Hessite
Formula: Ag2Te
Localities: Reported from at least 30 localities in this region.
Photo: © Simone Citon. Hessite from McAlpine Mine, Peñon Blanco Peak, Coulterville District, Mother Lode Belt, Tuolumne Co., California, USA
Hetaerolite
Formula: ZnMn2O4
Localities: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Desert View Mine, Fawnskin (Grout), Bear Valley District, San Bernardino Mts, San Bernardino Co., California, USA
Lead Mountain Mine (Main Barite Mine), Lead Mountain [2], Barstow, Barstow District, San Bernardino Co., California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Photo: © 2003 Robert O. Meyer. Hetaerolite from Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
Heterosite
Formula: (Fe3+,Mn3+)PO4
Locality: Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
'Heulandite'
Localities: Reported from at least 31 localities in this region.
Heulandite-Na
Formula: (Na,Ca,K)6(Si,Al)36O72 · 22H2O
Locality: U.S. Borax open pit (Boron pit), U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Photo: © 3/2017 Douglas Merson. Heulandite-Na from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Heulandite-Sr
Formula: (Sr,Na,Ca)5(Si27Al9)O72 · 24H2O
Locality: Josephine Mine (Josephine ledge; Josephine claim), Ord Mountain Mine (Ord Mountain Mine System; Ord Mine; Ord Mountain deposits; Osborn; Rio Vista claim; Brilliant claim; Josephine claim; Belgium claim; Copper Junction claim), Ord Mountain, Ord Mts, Ord District, San Bernardino Co., California, USA
Hexahydrite
Formula: MgSO4 · 6H2O
Localities: Leona mine, Leona Heights deposit, Leona Heights, Oakland, Oakland Hills, Diablo Range, Alameda Co., California, USA
Alma Mine (Alma Pyrite Mine), Leona Heights deposit, Leona Heights, Oakland, Oakland Hills, Diablo Range, Alameda Co., California, USA
Eagle Borax Spring, Death Valley, Inyo Co., California, USA
San Francisco North 7.5 quadrangle, San Francisco, San Francisco Co., California, USA
Heyrovskýite
Formula: Pb6Bi2S9
Localities: Lucky Lucy Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
St. Charles Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Jackass Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Hidalgoite
Formula: PbAl3(AsO4)(SO4)(OH)6
Locality: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Hillebrandite
Formula: Ca2(SiO3)(OH)2
Localities: Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Wet Weather Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Photo: © Elmar Lackner 2006. Hillebrandite from Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Hinsdalite
Formula: PbAl3(PO4)(SO4)(OH)6
Locality: Unnamed mine [1], Slate Mountain, Slate Mountain District, Slate Mts, El Dorado Co., California, USA
Hisingerite
Formula: Fe3+2(Si2O5)(OH)4 · 2H2O
Localities: Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Los Alamos Canyon, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Hisingerite-Tridymite occurrence, Santa Rosa, Sonoma Co., California, USA
Canwood Street site, Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Desert Gold Claims, Whitewater, Riverside Co., California, USA ? (more information)
Hohmannite
Formula: Fe3+2(SO4)2O · 8H2O
Locality: Redington Mine (Boston Mine; Knoxville Mine; Excellsior Mine), Knoxville, Knoxville District, Napa Co., California, USA
Hollandite
Formula: Ba(Mn4+6Mn3+2)O16
Localities: Afton Canyon, Afton, Cady Mts, San Bernardino Co., California, USA
Piemontite occurrence (San Gorgonio pass), Whitewater, Riverside Co., California, USA
Hollingworthite
Formula: (Rh,Pt,Pd)AsS
Localities: Yuba River placers, North San Juan, North San Juan District, Nevada Co., California, USA
Yuba River placers (Yuba Mine), Hammonton, Hammonton District (Yuba River District; Yuba Gold Field; Yuba Dredge Field; Yuba Consolidated Gold Fields), Yuba Co., California, USA
Hopeite
Formula: Zn3(PO4)2 · 4H2O
Locality: Elizabeth R. Mine (Hazel W. claim), Chief Mountain, Pala, Pala District, San Diego Co., California, USA
'Hornblende'
Localities: Reported from at least 70 localities in this region.
Photo: © 1999 San Diego Mining Company. Hornblende from Juan Diego Mine No. 1, Little Cahuilla Mountain, Cahuilla District, Riverside Co., California, USA
'Hornblendite'
Localities: Reported from at least 11 localities in this region.
Hörnesite
Formula: Mg3(AsO4)2 · 8H2O
Locality: Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
'Hornfels'
Localities: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Phoenix Tungsten Prospect (Murray Canyon Prospect; Maynard Prospect), Riverside Co., California, USA
Unnamed Prospects (MRDS - 10035346), Andreas Canyon Area, Riverside Co., California, USA
Housleyite (TL)
Formula: Pb6CuTe6+4O18(OH)2
Type Locality: Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Habit: monoclinic
Colour: grey blue to blue
Reference: IMA Approvals - July 2009; Kampf, A. R., J. Marty, and B. Thorne (2010), Lead-tellurium oxysalts from Otto Mountain near Baker, California: II. Housleyite, Pb6CuTe4O18(OH)2, a new mineral with Cu-Te octahedral sheets, American Mineralogist: 95: 1337-1342; Kampf, A.R., Mills, S.J., Housley, R.M., Marty, J., and Thorne, B. (2010): American Mineralogist 95, 1554–1559.
Localities: Recorded from at least 2 other localities in this region.
Photo: © JM 2010. Housleyite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Howieite (TL)
Formula: Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13
Type Locality: Laytonville Quarry (Longvale; Longvale Quarry), Laytonville, Coastal Range, Mendocino Co., California, USA
Reference: Agrell, S.O. (1964), Deerite, howieite, and zussmanite, three new minerals from the Franciscan of the Laytonville district, Mendocino County, California (title only), Am.Min.: 49; CM 28 (1990), 855; HB2/1 (1995); Wood, R. W. (1979) The iron-rich blueschist facies minerals: 2. Howieite. Mineralogical Magazine 43:363-370.; Robert Muir Wood (1982) The Laytonville Quarry (Mendocino County California) Exotic Block: Iron-rich Blueschist-Facies Subduction-Zone Metamorphism. Mineralogical Magazine 45:87-99.
Localities: Recorded from at least 10 other localities in this region.
Photo: © Rruff Project. Howieite from New Covelo Road roadcuts, North of Longvale, Longvale, Coastal Range, Mendocino Co., California, USA
Howlite
Formula: Ca2B5SiO9(OH)5
Localities: Reported from at least 13 localities in this region.
Photo: © Charles Creekmur. Howlite from Tick Canyon, Lang, Los Angeles Co., California, USA
Hübnerite
Formula: MnWO4
Localities: Reported from at least 10 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Hübnerite from Advance Mine, Colorado Hill, Loope, Monitor - Mogul District, Alpine Co., California, USA
Humboldtine
Formula: Fe2+(C2O4) · 2H2O
Locality: Black Mountain King Mine (Black Mtn. King Mine; Huckabay Mine), Alta Sierra, Greenhorn District (Greenhorn Mountains District), Greenhorn Mts, Kern Co., California, USA
Humite
Formula: (Mg,Fe2+)7(SiO4)3(F,OH)2
Localities: Crestmore quarries, Crestmore, Riverside Co., California, USA
Birch Creek, White Mts, Inyo Co., California, USA
Hungchaoite
Formula: Mg(B4O7) · 9H2O
Localities: Hard Scramble claim, Ryan, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
Meridian claim, Twenty Mule Team Canyon, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
South Meridian claim, Twenty Mule Team Canyon, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
Unnamed Borate occurrence [28], Twenty Mule Team Canyon, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
Huntite
Formula: CaMg3(CO3)4
Localities: Crestmore quarries, Crestmore, Riverside Co., California, USA
Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Photo: © Rruff Project. Huntite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Hureaulite
Formula: (Mn,Fe)5(PO4)2(HPO4)2 · 4H2O
Localities: Elizabeth R. Mine (Hazel W. claim), Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Stewart Mine (MS 6162; Stewart Lithia mine), Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Pack Rat Mine, Tule Mountain (Mount Tule; Tulley Mountain), Jacumba, Jacumba District, San Diego Co., California, USA
Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Photo: © 2003 Scott L. Ritchie. Hureaulite from Stewart Mine, Tourmaline Queen Mountain, Pala, Pala District, San Diego Co., California, USA
Hyalophane
Formula: (K,Ba)[Al(Si,Al)Si2O8]
Localities: Baumann prospect (Bauman Ranch), Dumtah, Tulare Co., California, USA
Josephine Mine (Josephine ledge; Josephine claim), Ord Mountain Mine (Ord Mountain Mine System; Ord Mine; Ord Mountain deposits; Osborn; Rio Vista claim; Brilliant claim; Josephine claim; Belgium claim; Copper Junction claim), Ord Mountain, Ord Mts, Ord District, San Bernardino Co., California, USA
Hydroboracite
Formula: CaMg[B3O4(OH)3]2 · 3H2O
Localities: Reported from at least 14 localities in this region.
Photo: © O. Dziallas 2005. Hydroboracite from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Hydrocalumite
Formula: Ca4Al2(OH)12(Cl,CO3,OH)2 · 4H2O
Locality: Crestmore quarries, Crestmore, Riverside Co., California, USA
Hydrohetaerolite
Formula: ZnMn2O4 · H2O
Locality: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Photo: © Brent Thorne 2011. Hydrohetaerolite from Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
Hydromagnesite
Formula: Mg5(CO3)4(OH)2 · 4H2O
Localities: Reported from at least 49 localities in this region.
Photo: © 2001 John H. Betts. Hydromagnesite from Livermore, Livermore District, Diablo Range, Alameda Co., California, USA
Hydrotalcite
Formula: Mg6Al2(OH)16[CO3] · 4H2O
Localities: Crestmore quarries, Crestmore, Riverside Co., California, USA
New Idria District, Diablo Range, San Benito Co., California, USA
New Idria Serpentinite Asbestos deposits, Wright Mountain, New Idria District, Diablo Range, Fresno Co., California, USA
New Idria Serpentine mass, New Idria District, Diablo Range, San Benito Co., California, USA
'Hydrotroilite'
Formula: FeS · H2O ?
Localities: Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Lone Star Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Wet Weather Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
New City Quarry (Victoria Avenue quarry), Riverside, Riverside Co., California, USA
Cascade Canyon, San Gabriel Mts, San Bernardino Co., California, USA
Hydroxyapophyllite-(K)
Formula: KCa4(Si8O20)(OH,F) · 8H2O
Localities: Baumann prospect (Bauman Ranch), Dumtah, Tulare Co., California, USA
Newbury Park, Santa Monica Mts, Ventura Co., California, USA
Hydroxylapatite
Formula: Ca5(PO4)3(OH)
Localities: Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 and 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA
Piemontite occurrence (San Gorgonio pass), Whitewater, Riverside Co., California, USA
Unnamed Phosphate occurrence (1), Hyampom, Klamath Mts, Trinity Co., California, USA
Yager Junction, Coastal Range, Humboldt Co., California, USA
Yellow Cat Mine, New Idria, New Idria District, Diablo Range, San Benito Co., California, USA
Photo: © mindat.org. Hydroxylapatite from Champion Mine, White Mountain Peak, White Mts, Mono Co., California, USA
Hydroxylapatite var: Carbonate-rich Hydroxylapatite
Formula: Ca5(PO4,CO3)3(OH,O)
Locality: Yager Junction, Coastal Range, Humboldt Co., California, USA
Hydroxylellestadite
Formula: Ca5(SiO4)1.5(SO4)1.5(OH)
Localities: Crestmore quarries, Crestmore, Riverside Co., California, USA
Jensen Quarry (Oak Quarry), Jurupa, Jurupa Mts, Riverside Co., California, USA
Photo: © 2008, JGW. Hydroxylellestadite from Jensen Quarry, Jurupa, Jurupa Mts, Riverside Co., California, USA
Hydroxylherderite
Formula: CaBe(PO4)(OH,F)
Localities: Reported from at least 8 localities in this region.
Photo: © 2005 SLR. Hydroxylherderite from Carmelita Mine, Chihuahua Valley, Warner Springs District, San Diego Co., California, USA
Hydrozincite
Formula: Zn5(CO3)2(OH)6
Localities: Reported from at least 22 localities in this region.
Photo: © Brent Thorne 2007. Hydrozincite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Hypercinnabar (TL)
Formula: HgS
Type Locality: Mount Diablo Mine (Mt. Diablo Mine; Diablo Mine; Ryne Mine), Mount Diablo (Mt Diablo), Mount Diablo State Park, Clayton, Diablo Range, Contra Costa Co., California, USA
Reference: [Am Min 63 (1978), 1143; Clark, 1993 - "Hey's Mineral Index"]
Photo: Hypercinnabar from Mount Diablo Mine, Mount Diablo, Mount Diablo State Park, Clayton, Diablo Range, Contra Costa Co., California, USA
'Hypersthene'
Formula: (Mg,Fe)SiO3
Localities: Reported from at least 12 localities in this region.
Ice
Formula: H2O
Localities: Lava Beds National Monument, Cascade Range, Siskiyou Co., California, USA
Lava Bed National Monument, Cascade Range, Modoc Co., California, USA
La Crescenta, Los Angeles Co., California, USA
Photo: © Fred & Linda Elsnau. Ice from La Crescenta, Los Angeles Co., California, USA
Idaite
Formula: Cu5FeS6
Localities: Lodi No. 4 Mine (Lodi No. 4 claim), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Mammoth Mine (Mammoth Copper Company; Anderson Mine; Mayflower Mine; Sheridan Mine; Gillispie Mine), Copper Crest group, Mammoth Butte, Backbone District, West Shasta Copper - Zinc District, Klamath Mts, Shasta Co., California, USA
'Iddingsite'
Formula: MgO · Fe2O3 · 3SiO2·4H2O
Localities: Reported from at least 12 localities in this region.
Photo: Iddingsite from Ludlow, San Bernardino Co., California, USA
Idrialite
Formula: C22H14
Localities: Reported from at least 12 localities in this region.
Photo: © California Institute of Technology. Idrialite from Skaggs Springs Mine, Skaggs Springs, Warm Springs Dam, Coast Range, Sonoma Co., California, USA
Ikaite
Formula: CaCO3 · 6H2O
Locality: Mono Lake, Mono Co., California, USA
Ilmenite
Formula: Fe2+TiO3
Localities: Reported from at least 102 localities in this region.
Photo: © 2001 John H. Betts. Ilmenite from New Idria District, Diablo Range, San Benito Co., California, USA
Ilmenite var: Manganoan Ilmenite
Formula: Fe2+TiO3
Locality: Bass Lake Quadrangle, Mariposa Co., California, USA
Ilsemannite
Formula: Mo3O8 · nH2O
Localities: Kergon Mine (Kergon group of claims; Kergon-Buckeye; Buckeye group; Kergon Mine Great Lakes Chemical Co.; Kergon-Buckete), Miracle Hot Springs (Hobo Hot Springs), Kern River Uranium District, Kern Co., California, USA
Unnamed Mo occurrence [2], Death Valley, Inyo Co., California, USA
Boulder Creek Mine (Schlosser Mine), Gibson, Klamath Mts, Shasta Co., California, USA
Miracle Mine, Miracle Hot Springs (Hobo Hot Springs), Kern River Uranium District, Kern Co., California, USA
Kern River Uranium District, Kern Co., California, USA
Ilvaite
Formula: CaFe3+Fe2+2(Si2O7)O(OH)
Localities: Petaluma, Sonoma Co., California, USA
Potter Creek (Potters Creek), North Gray Rocks, East Shasta Copper - Zinc District, Klamath Mts, Shasta Co., California, USA
Shasta Iron Company group (Shasta Iron Mine and California Consolidated Mine), Heroult, East Shasta Copper - Zinc District, Klamath Mts, Shasta Co., California, USA
Twin Lakes Limestone deposit, Lower Twin Lake, Twin Lakes, Fresno Co., California, USA
Imiterite
Formula: Ag2HgS2
Locality: Golden Rule Mine, Jumper & Golden Rule group (Jumper Mine; Jumper claim; Jumper deposit; New Era claim), Jamestown Mine (Jamestown group), Jamestown, Jamestown District, Mother Lode Belt, Tuolumne Co., California, USA
Inderite
Formula: MgB3O3(OH)5 · 5H2O
Localities: Reported from at least 7 localities in this region.
Photo: © Leon Hupperichs. Inderite from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
'Indicolite'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Localities: Reported from at least 27 localities in this region.
Photo: Indicolite from Blue Lady Mine, Chihuahua Valley, Warner Springs District, San Diego Co., California, USA
Inesite
Formula: Ca2(Mn,Fe)7Si10O28(OH)2 · 5H2O
Localities: Reported from at least 11 localities in this region.
Photo: © Christopher O'Neill. Inesite from Hale Creek Mine, Mad River Rock, Coastal Range, Trinity Co., California, USA
Inyoite (TL)
Formula: Ca(H4B3O7)(OH) · 4H2O
Type Locality: Monte Blanco Mine (Monte Blanco deposit; Monte Blanco adit), Monte Blanco, Black Mts, Amargosa Range, Inyo Co., California, USA
Habit: Tabular
Colour: White
Description: Occurs as tabular crystals altering to meyerhofferite.
Reference: Journal of the Washington Academy of Sciences (1914): 4: 354-356; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 359; Schaller, Waldemar Theodore (1916b), Inyoite and meyerhofferite, two new calcium borates: USGS Bulletin 610: 35; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 264.
Localities: Recorded from at least 8 other localities in this region.
Photo: © Rock Currier. Inyoite from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Iodargyrite
Formula: AgI
Localities: Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
NE2 vein, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © Brent Thorne 2010. Iodargyrite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Irarsite
Formula: (Ir,Ru,Rh,Pt)AsS
Localities: Gold Bluff beach, Gold Bluffs, Orick, Orick District, Humboldt Co., California, USA
American River, Folsom, Folsom District, Sacramento Co., California, USA
Knights Ferry, Stanislaus Co., California, USA
Iridium
Formula: (Ir,Os,Ru)
Localities: Reported from at least 24 localities in this region.
Photo: © 2007 Peter Cristofono. Iridium from Main Channel Trinity River, Junction City, Junction City District, Klamath Mts, Trinity Co., California, USA
Iridium var: Osmiridium
Formula: (Ir,Os,Ru)
Localities: Reported from at least 12 localities in this region.
Iridium var: Platiniridium
Formula: (Ir,Pt)
Locality: Enright claim, Trinity Center, Klamath Mts, Trinity Co., California, USA
Iridium var: Ruthenosmiridium
Formula: (Ir,Os,Ru)
Localities: Reported from at least 8 localities in this region.
Iron
Formula: Fe
Localities: Reported from at least 18 localities in this region.
Iron var: Kamacite
Formula: (Fe,Ni)
Localities: Reported from at least 15 localities in this region.
'Iron ore'
Localities: Cave Canyon Mine (Cave Canyon Iron Ore deposits; Cave Canyon Iron deposit; Baxter; Basin), Cave Canyon District, Cave Mountain, San Bernardino Co., California, USA
Ship Mountain Mine (Ship Mountain deposit; Paul deposit; Ship Mountain Iron Ore deposit), Ship Mts, San Bernardino Co., California, USA
Isoferroplatinum
Formula: Pt3Fe
Localities: North Fork Trinity River Canyon, North Fork District, Salmon Mts, Klamath Mts, Trinity Co., California, USA
Burns Creek Mine, Quartzburg School, Quartzburg, Hornitos District, West Belt, Mariposa Co., California, USA
Jacobsite
Formula: Mn2+Fe3+2O4
Localities: Manga-Chrome Mine (Manga Chrome; Magna-Chrome Mine; Duggan Mine; Steams and Owens [?]), Limekiln, Spenceville District, Nevada Co., California, USA
Railroad Lease Mine (Section Two; Southern Pacific Railroad lease; Railroad lease; Railroad Mine; Joe Sturdivant; Keno Compagnie Francise; Section 11 Mine; Southern Pacific), Boulder Peak, Altoona District, Trinity Mts, Klamath Mts, Trinity Co., California, USA
'Jade'
Localities: Reported from at least 34 localities in this region.
Jadeite
Formula: Na(Al,Fe3+)Si2O6
Localities: Reported from at least 21 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Jadeite from Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino Co., California, USA
'Jahnsite'
Locality: Elizabeth R. Mine (Hazel W. claim), Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Jahnsite-(MnMnMn) (TL)
Formula: {Mn2+}{Mn2+}{Mn2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O
Type Locality: Stewart Mine (MS 6162; Stewart Lithia mine), Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Reference: Min Mag 42 (1978), 309
Jamesonite
Formula: Pb4FeSb6S14
Localities: Reported from at least 11 localities in this region.
Jarosite
Formula: KFe3+ 3(SO4)2(OH)6
Localities: Reported from at least 66 localities in this region.
Photo: © Brent Thorne 2015. Jarosite from SW cut, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
'Jasper'
Formula: SiO2
Reference: Clark (1993), "Hey's Mineral Index".
Localities: Recorded from at least 82 other localities in this region.
Photo: © Rock Currier. Jasper from Unspecified Gemstone occurrence, Paradise Valley, Santa Cruz Mts, Santa Clara Co., California, USA
'Jasper var: Creolite'
Formula: SiO2
Reference: Clark (1993), "Hey's Mineral Index".
Localities: Recorded from at least 2 other localities in this region.
Jennite (TL)
Formula: Ca9(Si3O9)2(OH)8 · 8H2O
Type Locality: Crestmore quarries, Crestmore, Riverside Co., California, USA
Description: Occurs as small, blade-shaped crystals or fibrous aggregates partially filling open spaces in fractured contact rock. Always associated with tobermorite.
Reference: Carpenter, A.B., R.A. Chalmers, J.A. Gard, K. Speakman & H.F.W. Taylor (1966), Jennite, a new mineral: American Mineralogist: 51: 56-74; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 479.
Photo: © Arliguie M. Jennite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Joaquinite-(Ce) (TL)
Formula: NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O
Type Locality: California State Gem Mine (Dallas Gem Mine; Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Habit: Equant
Colour: Honey-yellow to orange-brown
Reference: Louderback, George Davis & Walter C. Blasdale (1909), Benitoite, its mineralogy, paragenesis and mode of occurrence: University of California, Department of Geological Sciences Bulletin: 5: 376; Palache, Charles & William Frederick Foshag (1932), The chemical nature of joaquinite: American Mineralogist: 17: 308-312; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 102, 234; Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 470.; William S. Wise (1982) Strontiojoaquinite and bario-orthojoaquinite: two new members of the joaquinite group . American Mineralogist 67:809-81
Localities: Recorded from at least 3 other localities in this region.
Photo: © Elmar Lackner 2009. Joaquinite-(Ce) from California State Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Johannite
Formula: Cu(UO2)2(SO4)2(OH)2 · 8H2O
Locality: Ram deposit (Ram Mine; Ram prospect), Old Dale area, Pinto Mts, Riverside Co., California, USA
Jonesite (TL)
Formula: Ba4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
Type Locality: California State Gem Mine (Dallas Gem Mine; Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Habit: Radiating aggregates
Colour: Colorless
Description: Occurs as minute crystals.
Reference: Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. The Mineralogical Record 8, 442-452; Wise, W.S. & Pabst, A. (1977): Jonesite a new mineral from the Benitoite Gem mine, San Benito County, California. The Mineralogical Record 8, 453-456; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 472.
Photo: © 1995-2001 Trinity Mineral Co.. Jonesite from California State Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Jordisite
Formula: MoS2
Locality: Kergon Mine (Kergon group of claims; Kergon-Buckeye; Buckeye group; Kergon Mine Great Lakes Chemical Co.; Kergon-Buckete), Miracle Hot Springs (Hobo Hot Springs), Kern River Uranium District, Kern Co., California, USA
Julgoldite-(Fe2+)
Formula: Ca2Fe2+Fe3+2(Si2O7)(SiO4)(OH)2 · H2O
Locality: Hale Creek Mine, Mad River Rock, Coastal Range, Trinity Co., California, USA
Junoite
Formula: Cu2Pb3Bi8(S,Se)16
Localities: Lucky Lucy Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Silver Spoon Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
St. Charles Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Kaersutite
Formula: {Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Localities: Ludlow (Stagg), San Bernardino Co., California, USA
Dish Hill Crater (Dish Hill; Siberia Hill; Siberia Hill Crater), Trojan, San Bernardino Co., California, USA
Coyote Peak, Coastal Range, Humboldt Co., California, USA
Kaliborite
Formula: KMg2H[B6O8(OH)5]2(H2O)4
Locality: Eagle Borax Spring, Death Valley, Inyo Co., California, USA
Kalinite
Formula: KAl(SO4)2 · 11H2O Not confirmed
Localities: Reported from at least 16 localities in this region.
Kampfite (TL)
Formula: Ba12(Si11Al5)O31(CO3)8Cl5
Type Locality: Esquire No. 1 claim, Rush Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Reference: Mineralogical Record (2002): 33: 163.
Localities: Recorded from at least 1 other locality in this region.
Photo: © Reiner Mielke. Kampfite from Rush Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Kaolinite
Formula: Al2(Si2O5)(OH)4
Localities: Reported from at least 90 localities in this region.
Photo: Kaolinite from Unspecified Hot Springs, Chester, Plumas Co., California, USA
Kaolinite var: Chrome-Kaolinite
Formula: Al2(Si2O5)(OH)4
Localities: Great Eastern and Mount Jackson Mine (Sonoma Mine; Sonoma Quicksilver Mines; Guerneville Mine; Great Eastern Mine; Mount Jackson Mine), Guerneville, Guerneville District, Coast Range, Sonoma Co., California, USA
Devils Pulpit, The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Kasolite
Formula: Pb(UO2)[SiO4] · H2O
Locality: Unnamed Kasolite occurrence [1], Twentynine Palms, Twentynine Palms District, San Bernardino Co., California, USA
Kawazulite
Formula: Bi2Te2Se
Locality: Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © Brent Thorne 2009. Kawazulite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Kempite (TL)
Formula: Mn2+2(OH)3Cl
Type Locality: Alum Rock Park, East Foothills, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
Colour: Green
Description: Minute crystals.
Reference: Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 74; Rogers, Austin Flint (1924b), Kempite, a new manganese mineral from Santa Clara County, California: American Journal of Science, 5th. Series: 8: 145-150; […(abstract): Geological Society of America Bulletin: 36: 206 (1925)]: 145; Rogers, Austin Flint (1924b), Kempite, a new manganese mineral from Santa Clara County, California: American Journal of Science, 5th. Series: 8: 145-150; […(abstract): Geological Society of America Bulletin: 36: 206 (1925)]: 145; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 235; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 190.
Photo: © 2008, JGW. Kempite from Alum Rock Park, East Foothills, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
Kenyaite
Formula: Na2Si22O41(OH)8 · 6H2O
Localities: Trinite Mining claim, Wildcat Peak, Halls Gulch District, Trinity Mts, Klamath Mts, Trinity Co., California, USA
Aqua de Ney spring, Box Canyon Dam, Azalea, Siskiyou Co., California, USA
SW cut, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
'Keratophyre'
Locality: Ord Mountain Mine (Ord Mountain Mine System; Ord Mine; Ord Mountain deposits; Osborn; Rio Vista claim; Brilliant claim; Josephine claim; Belgium claim; Copper Junction claim), Ord Mountain, Ord Mts, Ord District, San Bernardino Co., California, USA
Kermesite
Formula: Sb2S2O
Localities: Erskine Creek deposits (Tom Moore-Erskine Creek), Lake Isabella (Isabella) [town], Erskine Creek District, Kern Co., California, USA
Mojave Mine (Mohave Antimony Mine), Kern Co., California, USA
Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
Antimony Peak deposit (San Emigdio Mine; San Emigdio-Antimony Peak; Antimony Peak Mine), Antimony Peak, San Emigdio Mts, Kern Co., California, USA
Blind Spring District (Blind Spring Hill District; Benton District), Benton Range, Mono Co., California, USA
Photo: © Mineralogical Research Co.. Kermesite from Tom Moore Mine, Erskine Creek deposits, Lake Isabella (Isabella) [town], Erskine Creek District, Kern Co., California, USA
Kernite (TL)
Formula: Na2[B4O6(OH)2] · 3H2O
Type Locality: Rich Station bore hole, Rich, Kramer District (Kramer Borate District), Kern Co., California, USA
Reference: American Mineralogist (1927): 12: 24-25.
Localities: Recorded from at least 6 other localities in this region.
Photo: © Pedro González. Kernite from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Kettnerite
Formula: CaBiCO3OF
Localities: Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Reward Mine (Brown Monster Mine; Ruth; Hirsch and Telescope group; Brown Monster-Reward; Graham-Jones; Eclipse; Golden West claims; Hidden Treasure group; F. D. Roosevelt claims), Reward, Russ District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Fernando Mine (St. Charles; Hayward; Darwin Silver project; Fernando and St Charles), Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Photo: © 2010 by Jesse Crawford All rights Reserved. Kettnerite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Keystoneite
Formula: Mg0.5Ni2+Fe3+(Te4+O3)3 · 4.5H2O
Locality: McAlpine Mine, Peñon Blanco Peak, Coulterville District, Mother Lode Belt, Tuolumne Co., California, USA
Photo: © Brent Thorne. Keystoneite from McAlpine Mine, Peñon Blanco Peak, Coulterville District, Mother Lode Belt, Tuolumne Co., California, USA
'K Feldspar'
Localities: Reported from at least 43 localities in this region.
Photo: K Feldspar from Jurupa Mts, Riverside Co., California, USA
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Localities: Reported from at least 24 localities in this region.
Photo: Adularia from Unnamed Quartz-Ti occurrence [1], Big X Mountain, Claussenius, El Dorado Co., California, USA
'K Feldspar var: Valencianite'
Formula: KAlSi3O8
Locality: East of Milton, Milton, Calaveras Co., California, USA
Khinite
Formula: Pb2+Cu2+3[Te6+O6](OH)2
Localities: Reported from at least 7 localities in this region.
Photo: © JM 2010. Khinite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
'Khinite-3T'
Formula: Pb2+Cu2+3Te6+O6(OH)2
Localities: Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: Khinite-3T from Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Kinoshitalite
Formula: (Ba,K)(Mg,Mn2+,Al)3(Al2Si2O10)(OH)2
Locality: Trumbull Peak Ba-silicate deposit, Trumbull Peak, Clearing House, Clearing House District, East Belt, Mariposa Co., California, USA
Knorringite
Formula: Mg3Cr2(SiO4)3
Locality: Red Ledge Mine, Washington, Washington District (Omega District), Nevada Co., California, USA
Kobyashevite
Formula: Cu5(SO4)2(OH)6·4H2O
Locality: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Koechlinite
Formula: Bi2MoO6
Localities: Lodi No. 4 Mine (Lodi No. 4 claim), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Murdock Mine [2] (Plumas Jumbo Mine), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Photo: © Stephan Wolfsried 10/2016. Koechlinite from Lodi No. 4 Mine, Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Koninckite
Formula: Fe3+PO4 · 3H2O
Locality: New Idria Mine (New Idria group; New Hope vein), Idria (New Idria), New Idria District, Diablo Range, San Benito Co., California, USA
Konyaite
Formula: Na2Mg(SO4)2 · 5H2O
Locality: Eagle Borax Spring, Death Valley, Inyo Co., California, USA
Kornelite
Formula: Fe2(SO4)3 · 7H2O
Localities: Reported from at least 9 localities in this region.
Photo: © 2008, JGW. Kornelite from Coso Hot Springs, Coso District, Coso Mts, Inyo Co., California, USA
Kotulskite
Formula: Pd(Te,Bi)
Locality: Yuba River placers, North San Juan, North San Juan District, Nevada Co., California, USA
Krausite (TL)
Formula: KFe(SO4)2 · H2O
Type Locality: Sulphur Hole (Sulfur Hole; Sulphur pit), Calico, Calico District (Daggett District; Calico-Daggett area), Calico Mts (Calico Hills), San Bernardino Co., California, USA
Colour: Yellow
Description: Occurs as grains and crystals associated with other sulphates.
Reference: Foshag, William Frederick (1931c), Krausite, a new sulphate from California: American Mineralogist: 16: 352-360; Moller, W.P. (1963) Sulfur Hole. Mineralogist: 31, part 1, N. 3: 14-15; part 2, No. 4: 12, 13; Graeber, E.J. and Rosenzweig, A. (1965) The unit cell of krausite. American Mineralogist: 50: 504-507; Graeber, E.J., Morosin, B., and Rosenzweig, A. (1965) The crystal structure of krausite, KFe(SO4)2 •H2O. American Mineralogist: 50: 1929-1936; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 265, 273, 278; Joseph F. Cooper, Jr., Gail E. Dunning, Ted A. Hadley, and William P. Moller (2001) The Sulfur Hole, Calico District, San Bernardino County, California
Localities: Recorded from at least 1 other locality in this region.
Photo: Krausite from Calico Mts, San Bernardino Co., California, USA
Krauskopfite (TL)
Formula: BaSi2O5 · 3H2O
Type Locality: Esquire No. 1 claim, Rush Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Reference: Alfors, J.T., M.C. Stinson, R.A. Matthews & A. Pabst (1965), Seven new barium minerals from eastern Fresno County, California: American Mineralogist: 50: 318, 322-324; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 464; Nickel & Nichols (1991).
Localities: Recorded from at least 3 other localities in this region.
Photo: © Paul Bongaerts. Krauskopfite from Esquire No. 1 claim, Rush Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Kröhnkite
Formula: Na2Cu(SO4)2 · 2H2O
Localities: Leona mine, Leona Heights deposit, Leona Heights, Oakland, Oakland Hills, Diablo Range, Alameda Co., California, USA
Alma Mine (Alma Pyrite Mine), Leona Heights deposit, Leona Heights, Oakland, Oakland Hills, Diablo Range, Alameda Co., California, USA
Krupkaite
Formula: PbCuBi3S6
Locality: Silver Spoon Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Krut'aite
Formula: CuSe2
Locality: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Ktenasite
Formula: Zn(Cu,Zn)4(SO4)2(OH)6 · 6H2O
Locality: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Photo: © Brent Thorne 2017. Ktenasite from Santa Rosa Mine, Malpais Mesa, Inyo Mts, Inyo Co., California, USA
Kuksite
Formula: Pb3Zn3(PO4)2(TeO6)
Localities: Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
SW cut, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © Brent Thorne 2008. Kuksite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Kuranakhite
Formula: PbMn4+Te6+O6
Localities: Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
McAlpine Mine, Peñon Blanco Peak, Coulterville District, Mother Lode Belt, Tuolumne Co., California, USA
SW cut, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Kurnakovite
Formula: MgB3O3(OH)5 · 5H2O
Localities: Reported from at least 7 localities in this region.
Photo: © Rock Currier. Kurnakovite from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Kutnohorite
Formula: Ca(Mn,Mg,Fe)(CO3)2
Localities: Pennsylvania Mine, San Antonio Valley, Mount Hamilton, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
Laytonville Quarry (Longvale; Longvale Quarry), Laytonville, Coastal Range, Mendocino Co., California, USA
Kyanite
Formula: Al2(SiO4)O
Localities: Reported from at least 14 localities in this region.
Photo: Kyanite from Bluebird Kyanite Mine, Vitrefrax Hill, Obregon, Cargo Muchacho District, Cargo Muchacho Mts, Imperial Co., California, USA
'Labradorite'
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Localities: Reported from at least 10 localities in this region.
'Lacustrine deposit'
Localities: Reported from at least 17 localities in this region.
Lahnsteinite
Formula: Zn4(SO4)(OH)6 · 3H2O
Locality: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
'Lamprophyre'
Locality: Greenback Mine, Ord Mountain, Ord Mts, Ord District, San Bernardino Co., California, USA
'Lapis lazuli'
Localities: San Bernardino Co., California, USA
Big Horn Mine [2] (Bighorn Mine; Lapis Lazuli deposit), Stoddard Peak, San Gabriel Mts, San Bernardino Co., California, USA
Cascade Canyon, San Gabriel Mts, San Bernardino Co., California, USA
Photo: © baquetphoto.com. Lapis lazuli from Cascade Canyon, San Gabriel Mts, San Bernardino Co., California, USA
Larnite
Formula: Ca2SiO4
Locality: Paraspurrite type locality, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
'Laterite'
Localities: Reported from at least 8 localities in this region.
Laueite
Formula: Mn2+Fe3+2(PO4)2(OH)2 · 8H2O
Locality: Elder Canyon deposits, Elder Canyon, Anza-Borrego Desert State Park, San Diego Co., California, USA
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Localities: Reported from at least 39 localities in this region.
Photo: © Rock Currier. Laumontite from Pine Creek Mine, Scheelite, Bishop District, Inyo Co., California, USA
Laumontite var: Caporcianite
Formula: CaAl2Si4O12 · 4H2O
Locality: Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Laurionite
Formula: PbCl(OH)
Locality: Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Laurite
Formula: RuS2
Localities: Reported from at least 8 localities in this region.
Lawsonite (TL)
Formula: CaAl2(Si2O7)(OH)2 · H2O
Type Locality: Reed Station, Tiburon Uplands Nature Preserve, Tiburon Peninsula, Marin Co., California, USA
Description: Occurs in schists.
Reference: Ransome, Frederick Leslie (1895), On lawsonite, a new rock-forming mineral from the Tiburon Peninsula, Marin County: University of California, Department of Geological Science Bull.: 1: 301-312; American Mineralogist (1969) 54, 1139-1150; Papike, J.J. and Clark, J.R. (1968a) Cation distribution in the crystal structure of glaucophane; II: the high pressure polymorph. Geological Society of America Abstract, 1966: 157; Klein, C. (1969) Two-amphibole assemblages in the system actinolite-hornblende-glaucophane. American Mineralogist: 54: 212-237.
Localities: Recorded from at least 52 other localities in this region.
Photo: Lawsonite from Reed Station, Tiburon Uplands Nature Preserve, Tiburon Peninsula, Marin Co., California, USA
Lazulite
Formula: (Mg,Fe2+)Al2(PO4)2(OH)2
Localities: Reported from at least 11 localities in this region.
Photo: © Van King. Lazulite from Unnamed Fe-Lazulite occurrence [1], Stoddard Mountain, Rodman Mts, Belleville District, San Bernardino Co., California, USA
'Lazurite'
Formula: Na6Ca2(Al6Si6O24)(SO4,S,S2, S3,Cl,OH)2
Localities: Cascade Canyon, San Gabriel Mts, San Bernardino Co., California, USA
Big Horn Mine [2] (Bighorn Mine; Lapis Lazuli deposit), Stoddard Peak, San Gabriel Mts, San Bernardino Co., California, USA
Lazurite occurrence, San Antonio Creek, San Antonio Canyon, San Gabriel Mts, Los Angeles Co., California, USA
Unnamed Lazurite occurrence [1], Stoddard Peak, San Gabriel Mts, San Bernardino Co., California, USA
Ontario Peak, San Gabriel Mts, San Bernardino Co., California, USA (more information)
Photo: © California Institute of Technology. Lazurite from Cascade Canyon, San Gabriel Mts, Los Angeles Co., California, USA
Leadhillite
Formula: Pb4(CO3)2(SO4)(OH)2
Localities: Reported from at least 11 localities in this region.
Photo: © Doug Merson 2006. Leadhillite from Reward Mine, Reward, Russ District, Inyo Mts, Inyo Co., California, USA
Lechatelierite
Formula: SiO2
Localities: Riverside Co., California, USA
Indio, Riverside Co., California, USA
Unspecified Silica occurrences, Indio, Riverside Co., California, USA
Lake Isabella, Kernville, Cove District, Kern Co., California, USA
Placer Co., California, USA
Lennilenapeite
Formula: K6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2O
Locality: Outlet Creek occurrence, North of Longvale, Longvale, Coastal Range, Mendocino Co., California, USA
Photo: © Christopher O'Neill. Lennilenapeite from Outlet Creek occurrence, North of Longvale, Longvale, Coastal Range, Mendocino Co., California, USA
Lepidocrocite
Formula: γ-Fe3+O(OH)
Localities: Iron Mountain Mine (Number 8; Confidence; Old Mine), Iron Mountain, Iron Mountain [town], West Shasta Copper - Zinc District, Klamath Mts, Shasta Co., California, USA
Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Sunrise copper prospect, Nelson Range, Lee District, Inyo Co., California, USA
'Lepidolite'
Localities: Reported from at least 55 localities in this region.
Photo: © 2009 Eric C. Graff. Lepidolite from Himalaya Mine, Gem Hill, Mesa Grande District, San Diego Co., California, USA
Letovicite
Formula: (NH4)3H(SO4)2
Locality: The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Leucite
Formula: K(AlSi2O6)
Locality: Unnamed Leucite occurrence [1], Deep Springs Valley, Inyo Co., California, USA
Leucophosphite
Formula: KFe3+2(PO4)2(OH) · 2H2O
Localities: Head of Escarpado Canyon, Cima Hill, Escarpado Canyon, Diablo Range, Fresno Co., California, USA
Stewart Mine (MS 6162; Stewart Lithia mine), Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
'Lévyne'
Locality: Kanan Road (Ferrierite locality), Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Photo: © Van King. Lévyne from Kanan Road, Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Libethenite
Formula: Cu2(PO4)(OH)
Localities: Llanada Copper Mine, Llanada, Panoche Valley, Diablo Range, San Benito Co., California, USA
Rancheria Gulch, Mono Lake, Mono Co., California, USA
Toltec Mine area, Solomons Knob, Halloran Springs District, San Bernardino Co., California, USA
'Lignite'
Locality: Lot 232 Lignite pit (Coal Mine No. 4), Carbondale, Irish Hill District, Amador Co., California, USA
Lillianite
Formula: Pb3-2xAgxBi2+xS6
Locality: Unnamed Skarn occurrence [1], Lakeshore, Fresno Co., California, USA
'Limestone'
Localities: Reported from at least 226 localities in this region.
'Limonite'
Formula: (Fe,O,OH,H2O)
Localities: Reported from at least 184 localities in this region.
Photo: © 2003 Scott L. Ritchie. Limonite from Elizabeth R. Mine, Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Linarite
Formula: PbCu(SO4)(OH)2
Localities: Reported from at least 39 localities in this region.
Photo: © J.Ralph 2009. Linarite from Reward Mine, Reward, Russ District, Inyo Mts, Inyo Co., California, USA
Lindgrenite
Formula: Cu3(MoO4)2(OH)2
Localities: Lodi No. 4 Mine (Lodi No. 4 claim), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Murdock Mine [2] (Plumas Jumbo Mine), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Photo: © Brent Thorne. Lindgrenite from Lodi No. 4 Mine, Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Linnaeite
Formula: Co2+Co3+2S4
Locality: Klau Mine (Sierra Morena Mine; Karl Mine; Santa Cruz Mine; Sunderland Mine; Carson Mine), Klau Mine group, Adelaida, Adelaide District (Adelaide Klau District), Santa Lucia Mts (Santa Lucia Range), San Luis Obispo Co., California, USA
Liroconite
Formula: Cu2Al(AsO4)(OH)4 · 4H2O
Localities: Cerro Gordo Mine, Cerro Gordo, Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA ? (more information)
'Listvenite'
Locality: Mary Harrison Mine, Mary Harrison group, Coulterville, Coulterville District, Mother Lode Belt, Mariposa Co., California, USA
Litharge (TL)
Formula: PbO
Type Locality: Unnamed Pb occurrence [10], Cucamonga Peak, Lytle Creek District, San Gabriel Mts, San Bernardino Co., California, USA
Colour: Brownish orange-red
Description: Occurs as scales bordered by massicot.
Reference: Hanks, Henry Garber (1884), Fourth report of the State Mineralogist: California Mining Bureau. Report 4, 410 pp.: 256; Larsen, Esper Signius (1917), Massicot and litharge, the two modifications of lead monoxide: American Mineralogist: 2: 18-19; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 245, 257.
Localities: Recorded from at least 3 other localities in this region.
Lithiophilite
Formula: LiMn2+PO4
Localities: Reported from at least 13 localities in this region.
Photo: © 2004 Scott L. Ritchie. Lithiophilite from Stewart Mine, Tourmaline Queen Mountain, Pala, Pala District, San Diego Co., California, USA
Lithiophorite
Formula: (Al,Li)MnO2(OH)2
Localities: Sausalito Road Quarry, Sausalito, Marin Co., California, USA
Mount Hamilton, Diablo Range, Santa Clara Co., California, USA
Lizardite
Formula: Mg3(Si2O5)(OH)4
Localities: Reported from at least 11 localities in this region.
Lizardite var: Nickeloan Lizardite
Formula: Mg3(Si2O5)(OH)4
Locality: Humboldt Co., California, USA
Löllingite
Formula: FeAs2
Localities: Reported from at least 13 localities in this region.
Löllingite var: Cobaltian Löllingite
Formula: FeAs2
Locality: Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
Löweite
Formula: Na12Mg7(SO4)13 · 15H2O
Locality: Soda Lake, Carrizo Plain, San Luis Obispo Co., California, USA
Ludlamite
Formula: (Fe,Mn,Mg)3(PO4)2 · 4H2O
Locality: San Pedro Mine (Pedro mine), Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill), Pala, Pala District, San Diego Co., California, USA
Ludwigite
Formula: Mg2Fe3+(BO3)O2
Localities: Reported from at least 15 localities in this region.
Photo: © 2007 JSS. Ludwigite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Lüneburgite
Formula: Mg3[B2(OH)6](PO4)2 · 6H2O
Locality: Paoha Island, Mono Lake, Mono Co., California, USA
Luzonite
Formula: Cu3AsS4
Localities: Afterthought Mine, Ingot, East Shasta Copper - Zinc District, Klamath Mts, Shasta Co., California, USA
Rising Star Mine (Anchor lode), Bully Hill, Bully Hill, Bully Hill District (Winthrop District), East Shasta Copper - Zinc District, Klamath Mts, Shasta Co., California, USA
Christmas Gift Mine, Ophir Mountain, Darwin District, Darwin Hills, Inyo Co., California, USA
Morning Star Mine (Curtz Mine; Ardis Mine), Mogul Peak, Monitor - Mogul District, Alpine Co., California, USA
Photo: Luzonite from Morning Star Mine, Mogul Peak, Monitor - Mogul District, Alpine Co., California, USA
Macdonaldite (TL)
Formula: BaCa4Si16O36(OH)2 · 10H2O
Type Locality: Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Habit: Acicular
Colour: White to colorless
Description: Occurs as small radiating crystal aggregates to 12 mm diameter with individual crystals to 6 mm long.
Reference: Stinson, Melvin Clarence & J.T. Alfors (1964), New minerals from Fresno County – I: California Division Mines & Geology Mineral Information Service.: 17: 238; Nickel & Nichols (1991), Mineral Reference Manual: 124:
Localities: Recorded from at least 6 other localities in this region.
Photo: © 2006 Jason B. Smith. Macdonaldite from Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Mackinawite
Formula: (Fe,Ni)9S8
Localities: Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Mohawk Mine, Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Magadiite
Formula: Na2Si14O29 · 11H2O
Localities: Trinite Mining claim, Wildcat Peak, Halls Gulch District, Trinity Mts, Klamath Mts, Trinity Co., California, USA
Keene Wonder, Inyo Co., California, USA
Photo: © California Institute of Technology. Magadiite from Trinity Co., California, USA
Maghemite
Formula: Fe3+2O3
Localities: Reported from at least 7 localities in this region.
Magnesio-arfvedsonite
Formula: {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2
Locality: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Magnesiochromite
Formula: MgCr2O4
Localities: Reported from at least 168 localities in this region.
Photo: © Brent Thorne 2009. Magnesiochromite from Farm Hill No. 2 Mine, Upper Emerald Lake, Emerald Lake Hills, San Mateo Co., California, USA
Magnesiocopiapite (TL)
Formula: MgFe3+4(SO4)6(OH)2 · 20H2O
Type Locality: Blythe, Riverside Co., California, USA
Reference: American Mineralogist (1939): 24: 182; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 63.
Localities: Recorded from at least 2 other localities in this region.
Magnesioferrite
Formula: MgFe3+2O4
Localities: Unnamed Ti-Fe occurrence, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Magnesio-foitite
Formula: (□,Na)(Mg2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Locality: Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 and 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA
Photo: Magnesio-foitite from Champion Mine, White Mountain Peak, White Mts, Mono Co., California, USA
Magnesio-hornblende
Formula: ☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Locality: Coalinga Asbestos Mine (Coalinga Mine; Coalinga Asbestos deposit), Coalinga area, Diablo Range, Fresno Co., California, USA
Magnesio-riebeckite
Formula: ◻{Na2}{Mg3Fe3+2}(Si8O22)(OH)2
Localities: Salmon Creek, Sonoma Co., California, USA
Laytonville Quarry (Longvale; Longvale Quarry), Laytonville, Coastal Range, Mendocino Co., California, USA
Photo: © Elmar Lackner 2006. Magnesio-riebeckite from Salmon Creek, Sonoma Co., California, USA
Magnesite
Formula: MgCO3
Localities: Reported from at least 237 localities in this region.
Photo: © Dan & Diana Weinrich Minerals. Magnesite from McLaughlin Mine, Knoxville, Knoxville District, Napa Co., California, USA
Magnesite var: Ferroan Magnesite
Formula: (Mg,Fe)CO3
Localities: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Heath Canyon occurrences, Wrightwood, San Gabriel Mts, San Bernardino Co., California, USA
Magnesite var: Nickeloan Magnesite
Formula: MgCO3
Locality: Oakland Magnesite Company prospect (Deer Creek and North Mine; Oakland Magnesite Mine; Langley lease), Tennessee Knob, Tulare Co., California, USA
Magnetite
Formula: Fe2+Fe3+2O4
Localities: Reported from at least 308 localities in this region.
Photo: © 2008 Brandy Naugle. Magnetite from Clear Creek deposits, Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Magnetite var: Lodestone
Formula: Fe2+Fe3+2O4
Localities: Grouse Ridge occurrence, Clyde Mountain, Emigrant Gap District, Nevada Co., California, USA
Chaparral Hills deposits, Clipper Mills, Clipper Mills District, Butte Co., California, USA
Eagle Mountain Mine (Eagle Mountain Iron Mine; Eagle Mountain Iron deposit; Kaiser Steel Corp.), Eagle Mountain, Eagle Mountains District (Monte Negro District), Eagle Mts, Riverside Co., California, USA
Slate Range, San Bernardino Co., California, USA
Sparkling Mine (Sparkling Iron Mine), King Creek, Devils Postpile, Devils Postpile National Monument, Ritter Range, Madera Co., California, USA
Magnetite var: Titaniferous Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
Localities: Reported from at least 6 localities in this region.
Photo: Titaniferous Magnetite from Southwest of the Monte Cristo Mine, Monte Cristo Canyon, Acton, Acton District, San Gabriel Mts, Los Angeles Co., California, USA
Malachite
Formula: Cu2(CO3)(OH)2
Localities: Reported from at least 312 localities in this region.
Photo: © Karl Volkman 04/05. Malachite from Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
Maldonite
Formula: Au2Bi
Locality: Coon Hollow Mine (Coon Hollow Hydraulic Mine; Coon Hollow placer; Coon Hollow and Excelsior), Coon Hollow, Placerville (Hangtown), Placerville District, Mother Lode Belt, El Dorado Co., California, USA
'Manganese Oxides'
Localities: Reported from at least 113 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Manganese Oxides from Tourmaline Queen Mine, Tourmaline Queen Mountain, Pala, Pala District, San Diego Co., California, USA
'Manganese Oxides var: Manganese Dendrites'
Localities: Oceanview Mine (Oceanview adits; new Oceanview workings), Elizabeth R. Mine (Hazel W. claim), Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Clark Mine, Rincon Mountain, Rincon, Rincon District, San Diego Co., California, USA
Summit lode, Mountain Spring, Argus District (Kellcy District; Sherman District), Argus Mts (Argus Range), Inyo Co., California, USA
Manganhumite
Formula: (Mn2+,Mg)7(SiO4)3(OH)2
Locality: Agnew Meadow Mine (Agnew Meadow Manganese prospect/deposit; Mammoth Lakes), Olaine Lake, Agnew Meadows, Madera Co., California, USA
Manganite
Formula: Mn3+O(OH)
Localities: Reported from at least 26 localities in this region.
'Manganoan Calcite'
Formula: (Ca,Mn)CO3
Localities: Marin Co., California, USA
Manga-Chrome Mine (Manga Chrome; Magna-Chrome Mine; Duggan Mine; Steams and Owens [?]), Limekiln, Spenceville District, Nevada Co., California, USA
Burdell Ranch, Marin Co., California, USA
Caldwell Mine (Daly Mine), Granite Springs, Granite Springs District, West Belt, Mariposa Co., California, USA
White Knob Quarry, Lucerne Valley, Lucerne Valley Limestone District, San Bernardino Co., California, USA
Manganocummingtonite
Formula: ☐{Mn2+2}{Mg5}(Si8O22)(OH)2
Locality: Big Indian Mine (Big Indian deposit), Government Peak, Rand District (Randsburg District), Rand Mts, Kern Co., California, USA
'Marble'
Localities: Reported from at least 18 localities in this region.
Marcasite
Formula: FeS2
Localities: Reported from at least 90 localities in this region.
Photo: © Donald Volkman 01/11. Marcasite from Nipomo, San Luis Obispo Co., California, USA
Margarite
Formula: CaAl2(Al2Si2O10)(OH)2
Localities: Reported from at least 8 localities in this region.
'Margarodite'
Locality: Unspecified Mica occurrence [1], Table Rock, Howland Flat, Poker Flat District (Table Rock District), Sierra Co., California, USA
Marialite
Formula: Na4Al3Si9O24Cl
Localities: Reported from at least 6 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Marialite from Hunter Mountain, Ubehebe District, Cottonwood Mts, Panamint Mts, Inyo Co., California, USA
'Mariposite' (FRL)
Formula: K(Al,Cr)2(Al,Si)4O10(OH)2
Type Locality: Mariposa Co., California, USA
Description: Commonly occurs in schists and ankerite-quartz rock of gold veins.
Reference: Bowen, O.E., Jr. & C.H. Gray, Jr. (1957), Mines and mineral deposits of Mariposa County, California: California Journal of Mines and Geology: 53(1&2): 34-343; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 425.
Localities: Recorded from at least 42 other localities in this region.
Photo: © Charles Creekmur. Mariposite from Mariposa Co., California, USA
Markcooperite (TL)
Formula: Pb2(UO2)(TeO6)
Type Locality: Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Habit: monoclinic
Colour: brownish orange to orange
Reference: Kampf, A. R., Mills, S. J., Housley, R. M., Marty, J. & Thorne, B. (2010) Lead-tellurium oxysalts from Otto Mountain near Baker, California: IV. Markcooperite, Pb2(UO2)TeO6, the first natural uranyl tellurate. American Mineralogist, 95(10), 1554–1559.
Localities: Recorded from at least 1 other locality in this region.
Photo: © Brent Thorne 2010. Markcooperite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
'Marl'
Localities: Reported from at least 11 localities in this region.
Mascagnite
Formula: (NH4)2SO4
Localities: The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Geyser Canyon (Geyser Creek Canyon), The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Photo: © Crater Rock Museum. Mascagnite from The Geysers, West Mayacmas District, Mayacmas Mts, Sonoma Co., California, USA
'Maskelynite'
Locality: Los Angeles Martian meteorite, Los Angeles Co., California, USA
Massicot
Formula: PbO
Localities: Reported from at least 12 localities in this region.
Photo: © Elmar Lackner 2005. Massicot from Mohawk Mine, Mohawk Hill, Clark Mountain District, Clark Mts, San Bernardino Co., California, USA
Matildite
Formula: AgBiS2
Localities: Darwin District, Darwin Hills, Inyo Co., California, USA
Essex Mine (Essex workings), Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Jackass Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Mattheddleite
Formula: Pb5(SiO4)1.5(SO4)1.5(Cl,OH)
Localities: Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Bird Nest E3, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © Brent Thorne 2011. Mattheddleite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Maucherite
Formula: Ni11As8
Localities: Alta Mine (Alta California Mine; Alta Copper claim), Low Divide, Low Divide District, Klamath Mts, Del Norte Co., California, USA
Low Divide District, Klamath Mts, Del Norte Co., California, USA
Mazzite-Na (TL)
Formula: Na8[Al4Si14O36]2 · 30H2O
Type Locality: U.S. Borax open pit (Boron pit), U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Habit: Acicular
Colour: White
Reference: American Mineralogist (2005): 90: 1186-1191; Tschernich, R. (1992): Zeolites of the World: 64.
Photo: Mazzite-Na from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Mcallisterite (TL)
Formula: Mg2[B6O7(OH)6]2 · 9H2O
Type Locality: Mott prospect (Mott Colemanite prospect; Mott open cut), Twenty Mule Team Canyon, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
Colour: White
Description: Occurs as a minor constituent of efflorescence layer of fine-grained borates near weathered outcrops of colemanite and priceite. Small pellets 1 to 2 mm diameter.
Reference: Schaller, Waldemar Theodore, et al (1965), American Mineralogist: 65: 629-640; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 240.
Localities: Recorded from at least 4 other localities in this region.
Photo: © Knut Eldjarn. Mcallisterite from Furnace Creek District, Inyo Co., California, USA
Mcalpineite (TL)
Formula: Cu3(Te6+O6)
Type Locality: McAlpine Mine, Peñon Blanco Peak, Coulterville District, Mother Lode Belt, Tuolumne Co., California, USA
Reference: MM 58 (1994), 417; NM 90-94 (1997); Mineralogical Record (1996) 27:115-120
Localities: Recorded from at least 2 other localities in this region.
Photo: © Brent Thorne 2012. Mcalpineite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Mcguinnessite (TL)
Formula: (Mg,Cu)2(CO3)(OH)2
Type Locality: Copper King Mine, Red Mountain, Red Mountain District, Mayacmas Mts (Mayacamas Mts), Mendocino Co., California, USA
Reference: Min.Rec.(1981) 12, 143-147; MINERALOGICAL MAGAZINE, SEPTEMBER 1984, VOL. 48, PP. 457-9
Localities: Recorded from at least 1 other locality in this region.
Photo: © Karl Volkman 02/06. Mcguinnessite from Copper King Mine, Red Mountain, Red Mountain District, Mayacmas Mts, Mendocino Co., California, USA
Meionite
Formula: Ca4Al6Si6O24CO3
Localities: Crestmore quarries, Crestmore, Riverside Co., California, USA
Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
Melanophlogite
Formula: 46SiO2 · 6(N2,CO2) · 2(CH4,N2)
Localities: Reported from at least 19 localities in this region.
Photo: © Mineralogical Research Co.. Melanophlogite from Mount Hamilton Melanophlogite locality, East Mount Hamilton area, Mount Hamilton, Diablo Range, Santa Clara Co., California, USA
Melanotekite
Formula: Pb2Fe3+2(Si2O7)O2
Localities: Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA
SW cut, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Melanterite
Formula: FeSO4 · 7H2O
Localities: Reported from at least 43 localities in this region.
Photo: © Brent Thorne 2012. Melanterite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Melanterite var: Cuprian Melanterite
Formula: (Fe,Cu)SO4 · 7H2O
Localities: Alma Mine (Alma Pyrite Mine), Leona Heights deposit, Leona Heights, Oakland, Oakland Hills, Diablo Range, Alameda Co., California, USA
Unspecified Pisanite occurrence, Gonzales, Monterey Co., California, USA
Island Mountain Mine (Dahrman group; Island Mountain Consolidated Mine; Annex; Leach; Merritt Gore; Shotgun), Moose Peak, Island Mountain, Coastal Range, Trinity Co., California, USA
Alta Mine (Alta California Mine; Alta Copper claim), Low Divide, Low Divide District, Klamath Mts, Del Norte Co., California, USA
'Melilite Group'
Formula: Ca2M(XSiO7)
Localities: Crestmore quarries, Crestmore, Riverside Co., California, USA
Coyote Peak, Coastal Range, Humboldt Co., California, USA
'Melnikovite'
Localities: Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Coyote Peak, Coastal Range, Humboldt Co., California, USA
Melonite (TL)
Formula: NiTe2
Type Locality: Stanislaus Mine, Carson Hill Gold Mining Company Mines (Carson Hill Mines), Melones, Carson Hill District (Melones District), Mother Lode Belt, Calaveras Co., California, USA
Reference: American Mineralogist (1949): 34: 342; Genth F A (1868) Contributions to mineralogy - No. VII, The American Journal of Science and Arts, 95, 313; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 218; Hillebrand, William Francis (1900), Mineralogical notes: SS Bulletin 167: 60; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 66.
Localities: Recorded from at least 5 other localities in this region.
Mendozite
Formula: NaAl(SO4)2 · 11H2O
Localities: Unspecified old tunnel, Volcano, Volcano District, Amador Co., California, USA
Pritchard Ranch, Yountville, Napa Co., California, USA
North of Hidden Springs, Hidden Springs, San Bernardino Co., California, USA
Meneghinite
Formula: Pb13CuSb7S24
Locality: Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
Photo: © Arliguie M. Meneghinite from Pacific Limestone Products Quarry, Santa Cruz, Santa Cruz Co., California, USA
'Mercurian Tetrahedrite'
Formula: (Cu,Hg)12Sb4S13
Locality: Unnamed Mercurian Tetrahedrite occurrence [1], Ubehebe Peak, Ubehebe District, Cottonwood Mts, Panamint Mts (Panamint Range), Inyo Co., California, USA
Mercury
Formula: Hg
Localities: Reported from at least 79 localities in this region.
Photo: © Mark Mauthner. Mercury from Socrates Mine, Castle Rock Springs area, West Mayacmas District, Mayacmas Mts, Sonoma Co., California, USA
Merlinoite
Formula: (K,Na)5(Ca,Ba)2Al9Si23O64 · 23H2O
Locality: Searles Lake, San Bernardino Co., California, USA
Merrillite
Formula: Ca9NaMg(PO4)7
Locality: Los Angeles Martian meteorite, Los Angeles Co., California, USA
Merwinite (TL)
Formula: Ca3Mg(SiO4)2
Type Locality: Wet Weather Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Reference: Larsen, Esper Signius & William F. Foshag (1921), Merwinite, a new calcium magnesium orthosilicate from Crestmore, California: American Mineralogist:6: 143-148; Woodford, A.O., Crippen, R.A., and Garner, K.B. (1941) Section Across Commercial Quarry, Crestmore, California. American Mineralogist: 26: 366.
Localities: Recorded from at least 2 other localities in this region.
Photo: © California Institute of Technology. Merwinite from Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Mesolite
Formula: Na2Ca2Si9Al6O30 · 8H2O
Localities: Reported from at least 6 localities in this region.
Meta-autunite
Formula: Ca(UO2)2(PO4)2 · 6-8H2O
Localities: Reported from at least 7 localities in this region.
Metacinnabar (TL)
Formula: HgS
Type Locality: Redington Mine (Boston Mine; Knoxville Mine; Excellsior Mine), Knoxville, Knoxville District, Napa Co., California, USA
Description: Occurs in large amounts in the upper part of the mine.
Reference: Durand, F.E. (1873), Notes on the crystallization of metacinnabarite: California Academy of Science Proceedings: 4: 219-220; Hanks, Henry Garber (1884), Fourth report of the State Mineralogist: California Mining Bureau. Report 4, 410 pp.: 261; Ransome, Alfred Leslie & J.L. Kellogg (1939), Quicksilver resources of California: California Journal of Mines and Geology, California Division Mines (Report 35): 35: 410; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 254-255, 262; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 118.; USBM IC8252; Emmons and Becker (1885) Statistics and Technology of the precious Metals. Census reports Tenth census. June 1, 1880, Volume 13 By United States. Census office. 10th census, 1880, United States. Census Office
Localities: Recorded from at least 66 other localities in this region.
Photo: © O. Dziallas 2005. Metacinnabar from Mount Diablo Mine, Mount Diablo, Mount Diablo State Park, Clayton, Diablo Range, Contra Costa Co., California, USA
Metacinnabar var: Onofrite
Formula: Hg(S,Se)
Locality: New Idria Mine (New Idria group; New Hope vein), Idria (New Idria), New Idria District, Diablo Range, San Benito Co., California, USA
Metahaiweeite (TL)
Formula: Ca(UO2)2Si6O15 · nH2O
Type Locality: Unnamed U occurrence [1], Coso District (New Coso District), Coso Mts (Coso Range), Inyo Co., California, USA
Reference: American Mineralogist (1970): 55: 185.
'Metamorphic rock'
Localities: Bright Outlook Mine (Owl No. 1), Rainbow Wells, Marl Mts, San Bernardino Co., California, USA
Unknown REE-Baryte Mine [1], Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Metamunirite
Formula: NaVO3
Locality: Agnew Meadow Mine (Agnew Meadow Manganese prospect/deposit; Mammoth Lakes), Olaine Lake, Agnew Meadows, Madera Co., California, USA
'Metasandstone'
Locality: Unnamed Metasandstone Quarry (MRDS - 10285690), Riverside Co., California, USA
'Metasedimentary rock'
Localities: Coyote Mountains (Golden State Mining and Marble; Southern California Marble; Creole Marble; Columbia Cement), Coyote Mts, Imperial Co., California, USA
Corona Lead-Zinc Mine, Corona, Riverside Co., California, USA
Unnamed Iron Prospect (MRDS - 10036164), Riverside Co., California, USA
Metastibnite
Formula: Sb2S3
Localities: The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Sulphur Bank Mine (Sulfur Bank Mine; Sulphur Bank deposits), Clear Lake Oaks, Sulphur Creek District (Sulfur Creek District; Wilbur Springs District), Lake Co., California, USA
Big Geyser property, The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Bishop Antimony Mine, Bishop, Bishop District (Tungsten Hills District), Inyo Co., California, USA
Photo: © Scapin Giovanni. Metastibnite from Sulphur Bank Mine, Clear Lake Oaks, Sulphur Creek District, Lake Co., California, USA
Metatorbernite
Formula: Cu(UO2)2(PO4)2 · 8H2O
Localities: Reported from at least 11 localities in this region.
'Metavolcanic rock'
Localities: Hazador Canyon Gypsum Deposit (Hagador Canyon Gypsum Deposit), Riverside Co., California, USA
Fearnot Mine, Turtle Mountain, Bell Mountain, San Bernardino Co., California, USA
Lismore Mine, Turtle Mountain, Bell Mountain, San Bernardino Co., California, USA
OK prospect, Ord Mountain, Ord Mts, Ord District, San Bernardino Co., California, USA
Metavoltine
Formula: Na6K2FeFe6(SO4)12O2 · 18H2O
Locality: Sulphur Hole (Sulfur Hole; Sulphur pit), Calico, Calico District (Daggett District; Calico-Daggett area), Calico Mts (Calico Hills), San Bernardino Co., California, USA
Metazeunerite
Formula: Cu(UO2)2(AsO4)2 · 8H2O
Localities: Reported from at least 6 localities in this region.
Meyerhofferite (TL)
Formula: Ca2(H3B3O7)2 · 4H2O
Type Locality: Monte Blanco Mine (Monte Blanco deposit; Monte Blanco adit), Monte Blanco, Black Mts, Amargosa Range, Inyo Co., California, USA
Colour: White
Description: Occurs as chalky to silky pseudomorphs after inyoite, as alteration coatings on inyoite crystals, and as long, glassy, interlaced crystals formed by recrystallization of the original fibrous material.
Reference: Journal of the Washington Academy of Science (1914): 4: 354-356; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, 7th. ed., Volume II: 357, 359; Schaller, Waldemar Theodore (1916b), Inyoite and meyerhofferite, two new calcium borates: USGS Bulletin 610: 35; Foshag, William Frederick (1921), The origin of the colemanite deposits of California: Economic Geology: 16: 200; Foshag, William Frederick (1924a), Famous mineral localities: Furnace Creek, Death Valley, California: American Mineralogist: 9: 10; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 264.
Localities: Recorded from at least 8 other localities in this region.
Photo: © 2006 John Sobolewski. Meyerhofferite from Monte Blanco Mine, Monte Blanco, Black Mts, Amargosa Range, Inyo Co., California, USA
Miargyrite
Formula: AgSbS2
Localities: Reported from at least 10 localities in this region.
Photo: © Dan & Diana Weinrich Minerals. Miargyrite from Kelly Mine, Randsburg, Rand District, Rand Mts, Kern Co., California, USA
'Mica Group'
Localities: Reported from at least 79 localities in this region.
Photo: © 2015 Jstewart. Mica Group from Tourmaline Queen Mountain, Pala, Pala District, San Diego Co., California, USA
'Mica schist'
Localities: Reported from at least 6 localities in this region.
Microcline
Formula: K(AlSi3O8)
Localities: Reported from at least 109 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Microcline from Elizabeth R. Mine, Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Microcline var: Amazonite
Formula: K(AlSi3O8)
Locality: Unnamed Amazonite occurrence [1], Haystack Mountain (Haystack; Boulder Mountain; Kern Knob), Inyo Mts (Inyo Range), Inyo Co., California, USA
Photo: © Bob Griffis and Bob Griffis Minerals . Amazonite from Unnamed Amazonite occurrence [1], Haystack Mountain, Inyo Mts, Inyo Co., California, USA
Microlite Group
Localities: Reported from at least 10 localities in this region.
Microlite Group var: Stannomicrolite (of Hogarth 1977)
Locality: Himalaya Mine (Himalaya dikes; Himalaya pegmatite), Gem Hill, Mesa Grande District, San Diego Co., California, USA
Microlite Group var: Uranmicrolite (of Hogarth 1977)
Localities: Himalaya Mine (Himalaya dikes; Himalaya pegmatite), Gem Hill, Mesa Grande District, San Diego Co., California, USA
Little Three Mine (Little 3 mine), Ramona, Ramona District, San Diego Co., California, USA
Photo: © 2008 Jesse Fisher. Reproduction prohibited without prior permission.. Uranmicrolite (of Hogarth 1977) from Himalaya Mine, Gem Hill, Mesa Grande District, San Diego Co., California, USA
'Migmatite'
Localities: Monumental Pass Mine (Unnamed mine), Eagle Peak, Sacramento Mts, San Bernardino Co., California, USA
Cherokee Mine, Eagle Peak, Sacramento Mts, San Bernardino Co., California, USA
J.A.W. Mine, Center Peak, White Mountain, Bear Valley District, San Bernardino Mts, San Bernardino Co., California, USA
Millerite
Formula: NiS
Localities: Reported from at least 28 localities in this region.
Photo: © 2012, JGW. Millerite from Mount Diablo Mine, Mount Diablo, Mount Diablo State Park, Clayton, Diablo Range, Contra Costa Co., California, USA
Mimetite
Formula: Pb5(AsO4)3Cl
Localities: Reported from at least 30 localities in this region.
Photo: © Steve Sorrell. Mimetite from Reward Mine, Reward, Russ District, Inyo Mts, Inyo Co., California, USA
Mimetite var: Chromian Mimetite
Formula: Pb5(AsO4)3Cl
Locality: Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © Alex Earl 2017. Chromian Mimetite from Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Minium
Formula: Pb3O4
Localities: Reported from at least 10 localities in this region.
Mirabilite
Formula: Na2SO4 · 10H2O
Localities: Reported from at least 13 localities in this region.
Photo: © Rock Currier. Mirabilite from Soda Lake, Carrizo Plain, San Luis Obispo Co., California, USA
Mitridatite
Formula: Ca2Fe3+3(PO4)3O2 · 3H2O
Locality: Pack Rat Mine, Tule Mountain (Mount Tule; Tulley Mountain), Jacumba, Jacumba District, San Diego Co., California, USA
Mixite
Formula: BiCu6(AsO4)3(OH)6 · 3H2O
Localities: Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Unnamed Cu prospect [4], Cerro Gordo Peak, Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Cerro Gordo Mine, Cerro Gordo, Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Moctezumite
Formula: Pb(UO2)(TeO3)2
Locality: Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA - erroneously reported
Mogánite
Formula: SiO2
Locality: Cornell Road, Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Mojaveite (TL)
Formula: Cu6[Te6+O4(OH)2](OH)7Cl
Type Locality: Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Reference: Mills, S.J., Kampf, A.R., Christy, A.G., Housley, R.M., Rossman, G.R. and Marty, J. (2014) Mojaveite, IMA 2013-120. CNMNC Newsletter No. 20, June 2014, page 550; Mineralogical Magazine, 78, 549-558; Mills, S.J., Kampf, A.R., Christy, A.G., Housley, R.M., Rossman, G.R., Reynolds, R.E., Marty, J. (2014): Bluebellite and mojaveite, two new minerals from the central Mojave Desert, California, USA. Mineralogical Magazine, 78, 1325-1340.
Localities: Recorded from at least 6 other localities in this region.
Photo: © Brent Thorne 2014. Mojaveite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Molybdenite
Formula: MoS2
Localities: Reported from at least 155 localities in this region.
Photo: Molybdenite from Pine Creek Mine, Scheelite, Bishop District, Inyo Co., California, USA
'Molybdenite-2H'
Localities: Alpine Mine, Stevens Peak, Hope Valley District, Alpine Co., California, USA
Buchanan prospect (Kenawyer Mine), Kanawyers, Kings Canyon National Park, Fresno Co., California, USA
Brownstone Mine (Brownstone deposit; Brownstone Nos. 1 and 2 claims), Scheelite, Bishop District (Tungsten Hills District), Inyo Co., California, USA
Molybdite
Formula: MoO3
Locality: Sierra Buttes Mine (Sierra City Mine; Bigelow Mine; Buttes Union Mine; Ariel Independence Mine; Ariel vein; Whiskey vein; Smith vein), Sierra City, Sierra City District, Sierra Co., California, USA
'Monazite'
Localities: Reported from at least 53 localities in this region.
Photo: © Steve Sorrell. Monazite from Cross Hill, Juniper Flats, Neuvo, Riverside Co., California, USA
Monazite-(Ce)
Formula: Ce(PO4)
Localities: Jensen Quarry (Oak Quarry), Jurupa, Jurupa Mts, Riverside Co., California, USA
Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Audrey Lynn Mine (Audrey Lynne Mine; Jumping Joe claims), Little Cahuilla Mountain, Cahuilla District, Riverside Co., California, USA
Southern Pacific Silica Quarry (Southern Pacific Quarry; S.P. Silica Quarry; S.P. Mine; Nuevo Quarry; Nuevo Mine), Lakeview Mountains, Nuevo, Riverside Co., California, USA
Moncheite
Formula: (Pt,Pd)(Te,Bi)2
Locality: Unnamed PGE placer deposit [1], San Joaquin River, Friant, Fresno Co., California, USA
Monetite
Formula: Ca(HPO4)
Locality: Paoha Island, Mono Lake, Mono Co., California, USA
Montebrasite
Formula: LiAl(PO4)(OH)
Localities: Reported from at least 6 localities in this region.
Photo: © g.slak 2009. Montebrasite from Royal Mine, Rodriguez Canyon, Banner District, San Diego Co., California, USA
Monticellite
Formula: CaMgSiO4
Localities: Reported from at least 9 localities in this region.
Photo: © Elmar Lackner 2007. Monticellite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Localities: Reported from at least 80 localities in this region.
Photo: © Alan Goldstein. Montmorillonite from Elizabeth R. Mine, Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Montroydite
Formula: HgO
Localities: Reported from at least 11 localities in this region.
Photo: © 2004 Robert O. Meyer. Montroydite from Socrates Mine, Castle Rock Springs area, West Mayacmas District, Mayacmas Mts, Sonoma Co., California, USA
'Monzonite'
Locality: New Bessemer Mine (Alarm Mine), Bessemer Mines, Iron Ridge, Lava Beds District (Newberry District), Lava Bed Mts, San Bernardino Co., California, USA
'Moonstone'
Localities: Unnamed Gemstone occurrence [1], Funeral Mts (Funeral Range), Amargosa Range, Inyo Co., California, USA
Moonstone Beach, Cambria, Cambria-Oceanic District, Santa Lucia Mts (Santa Lucia Range), San Luis Obispo Co., California, USA (more information)
Mordenite
Formula: (Na2,Ca,K2)Al2Si10O24 · 7H2O
Localities: Reported from at least 18 localities in this region.
Photo: © Dick Dionne. Mordenite from Red Rock Canyon prospects, Ricardo, El Paso Mountains District, El Paso Mts, Kern Co., California, USA
Morenosite
Formula: NiSO4 · 7H2O
Localities: Reported from at least 8 localities in this region.
Morimotoite
Formula: Ca3(Ti,Fe2+,Fe3+)2((Si,Fe3+)O4)3
Locality: San Benito Co., California, USA
Morinite
Formula: NaCa2Al2(PO4)2(OH)F4 · 2H2O
Locality: San Diego Co., California, USA
Mosesite
Formula: (Hg2N)(Cl,SO4,MoO4) · H2O
Localities: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Challenge deposit, Emerald Lake Hills, San Mateo Co., California, USA
Mottramite
Formula: PbCu(VO4)(OH)
Localities: Reported from at least 18 localities in this region.
Photo: © JM 2010. Mottramite from Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Mountainite
Formula: KNa2Ca2[Si8O19(OH)] · 6H2O
Locality: Trinite Mining claim, Wildcat Peak, Halls Gulch District, Trinity Mts, Klamath Mts, Trinity Co., California, USA
Mountkeithite
Formula: [(Mg1-xFe3+x)(OH)2][SO4]x/2 · nH2O
Locality: Clear Creek Canyon, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Photo: © Steve Sorrell. Mountkeithite from Clear Creek Canyon, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
'Mud'
Locality: Owls Head Celestite prospect (Owlshead), Owl Hole Springs, Owlshead Mts, San Bernardino Co., California, USA
Muirite (TL)
Formula: Ba10Ca2Mn2+Ti[(OH,Cl,F)|HSi2O7]5
Type Locality: Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Colour: Orange
Description: Occurs as grains 1 mm or less in diameter.
Reference: Matthews, Robert Alfred & John T. Alfors (1962), Sanbornite from Rush Creek, Fresno County: California Division Mines & Geology Mineral Information Service: 15(6): 1-3; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 465; American Mineralogist (1965) 50, 314-340; Mineralogical Record (2002): 33: 161.
Localities: Recorded from at least 1 other locality in this region.
Photo: © Łukasz Kruszewski 2007. Muirite from Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Munakataite
Formula: Pb2Cu2(Se4+O3)(SO4)(OH)4
Localities: Reported from at least 6 localities in this region.
Photo: © California Institute of Technology. Munakataite from Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Murdochite
Formula: PbCu6O8-x(Cl,Br)2x where x<=0.5
Localities: Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Lead Mountain Mine (Main Barite Mine), Lead Mountain [2], Barstow, Barstow District, San Bernardino Co., California, USA ? (more information)
Photo: © Brent Thorne 2007. Murdochite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Muscovite (TL)
Formula: KAl2(AlSi3O10)(OH)2
Type Locality: Mariposa Co., California, USA
Description: Commonly occurs in schists and ankerite-quartz rock of gold veins.
Reference: Bowen, O.E., Jr. & C.H. Gray, Jr. (1957), Mines and mineral deposits of Mariposa County, California: California Journal of Mines and Geology: 53(1&2): 34-343; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 425.
Localities: Recorded from at least 352 other localities in this region.
Photo: © Rob Lavinsky & irocks.com. Muscovite from Pack Rat Mine, Tule Mountain, Jacumba, Jacumba District, San Diego Co., California, USA
Muscovite var: Alurgite
Formula: K2(Mg,Al)4-5(Al,Si)8O20(OH)4
Locality: Unnamed Mn occurrence [13], Cajon Pass, Cajon, San Bernardino Mts, San Bernardino Co., California, USA
Muscovite var: Barium-Vanadium-Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Locality: Silver Knob occurrence, Silver Knob, Fish Camp, Mariposa Co., California, USA
Muscovite var: Fuchsite
Formula: K(Al,Cr)3Si3O10(OH)2
Localities: Reported from at least 8 localities in this region.
Photo: © g.slak 2008. Fuchsite from Cascade Canyon, San Gabriel Mts, San Bernardino Co., California, USA
Muscovite var: Illite
Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2
Localities: Reported from at least 10 localities in this region.
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Localities: Reported from at least 131 localities in this region.
'Mylonite'
Locality: Minnie Gold Mine (Gold Turtle; Desert Gold group), Bannock, Ibex District, Sacramento Mts, San Bernardino Co., California, USA
Nadorite
Formula: PbSbClO2
Locality: Crestmore quarries, Crestmore, Riverside Co., California, USA
Nagyágite
Formula: [Pb3(Pb,Sb)3S6](Au,Te)3
Localities: Dorleska Mine, Preachers Peak, Klamath Mts, Trinity Co., California, USA
Stanislaus Mine, Carson Hill Gold Mining Company Mines (Carson Hill Mines), Melones, Carson Hill District (Melones District), Mother Lode Belt, Calaveras Co., California, USA ? (more information)
Nahcolite
Formula: NaHCO3
Localities: Searles Lake, San Bernardino Co., California, USA
Deep Springs Lake (Deep Springs Playa), Deep Springs Valley, Inyo Co., California, USA
Photo: © Rob Lavinsky & irocks.com. Nahcolite from California, USA
Namibite
Formula: Cu(BiO)2(VO4)(OH)
Localities: Reported from at least 6 localities in this region.
Photo: © JM-2013. Namibite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
'Napalite'
Formula: C3H4
Localities: Aetna Mine, Aetna Springs, East Mayacmas District, Mayacmas Mts (Mayacamas Mts), Napa Co., California, USA
Silver Bar Mine, Napa Co., California, USA
Skaggs Springs Mine, Skaggs Springs, Warm Springs Dam, Coast Range, Sonoma Co., California, USA
Photo: © Weinrich Minerals, Inc.. Napalite from Skaggs Springs Mine, Skaggs Springs, Warm Springs Dam, Coast Range, Sonoma Co., California, USA
Nasonite
Formula: Pb6Ca4(Si2O7)3Cl2
Locality: Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
'Native Amalgam'
Formula: (Ag,Hg)
Locality: Unspecified Hg-Au mine [1], Mariposa, Bagby-Mariposa-Mount Bullion-Whitlock District, Mother Lode Belt, Mariposa Co., California, USA
Natrite
Formula: Na2CO3
Localities: Aqua de Ney spring, Box Canyon Dam, Azalea, Siskiyou Co., California, USA
Deep Springs Valley Mine, Deep Springs Lake (Deep Springs Playa), Deep Springs Valley, Inyo Co., California, USA
Natroalunite
Formula: NaAl3(SO4)2(OH)6
Localities: Funeral Mts (Funeral Range), Amargosa Range, Inyo Co., California, USA
Lassen Peak, Lassen Volcanic National Park, Cascade Range, Shasta Co., California, USA
Long Valley District, Mono Co., California, USA
Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 and 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA
Natroalunite var: Strontian Natroalunite
Formula: NaAl3(SO4)2(OH)6
Localities: Long Valley District, Mono Co., California, USA
Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 and 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA
Natrojarosite
Formula: NaFe3(SO4)2(OH)6
Localities: Palos Verdes Hills (Palos Verdes Cliffs), Palos Verdes peninsula, Los Angeles Co., California, USA
Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
California Borate Company property (Western Borax Mine; Western Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
SW cut, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © 2006 SLR. Natrojarosite from Palos Verdes Hills, Palos Verdes peninsula, Los Angeles Co., California, USA
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Localities: Reported from at least 44 localities in this region.
Photo: © Rock Currier. Natrolite from California State Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Natron
Formula: Na2CO3 · 10H2O
Localities: Owens Lake, Olancha, Owens Valley, Inyo Co., California, USA
Borax Lake (Big Borax Lake), Clear Lake Oaks, Sulphur Creek District (Sulfur Creek District; Wilbur Springs District), Lake Co., California, USA
Searles Lake, San Bernardino Co., California, USA
Naumannite
Formula: Ag2Se
Localities: Grass Valley, Grass Valley District, Nevada Co., California, USA
Idaho-Maryland Mine (Idaho Maryland prospect; Maryland Mine; Howard Hill/Morning Dew; Idaho Maryland-Brunswick), Idaho-Maryland group, Grass Valley, Grass Valley District, Nevada Co., California, USA
Pittsburg-Liberty Mine (Pittsburg claim; Pittsburg No. 2 claim; Liberty claim; Liberty No. 2 claim), New York Hill, Masonic District, Bodie Hills, Mono Co., California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Nekoite (TL)
Formula: Ca3Si6O15·7H2O
Type Locality: Wet Weather Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Colour: White
Description: Fibrous
Reference: Gard, John Alan & H.F.W. Taylor (1956), Okenite and nekoite: Mineralogical Magazine: 31: 5-20; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 477.
Photo: © 2008, JGW. Nekoite from Crestmore quarries, Crestmore, Riverside Co., California, USA
Neotocite
Formula: (Mn,Fe,Mg)SiO3 · H2O
Localities: Reported from at least 19 localities in this region.
Nepheline
Formula: (Na,K)AlSiO4
Localities: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Unnamed Zeolite occurrence [1], Archer Camp, New Idria District, Diablo Range, Fresno Co., California, USA
Unnamed Nepheline occurrence [1], White Top Mountain, Goldbelt District, Cottonwood Mts, Panamint Mts (Panamint Range), Inyo Co., California, USA
'Nephrite'
Localities: Reported from at least 23 localities in this region.
Photo: Nephrite from Santa Lucia Mts, Monterey Co., California, USA
'Nephrite var: Black Nephrite Jade'
Locality: Stoddard Wells Black Jade locality (Victorville Black Jade locality; Sidewinder Mountains Black Jade locality), Stoddard Mountain, Rodman Mts, Belleville District, San Bernardino Co., California, USA
Népouite
Formula: (Ni,Mg)3(Si2O5)(OH)4
Localities: Reported from at least 11 localities in this region.
Neptunite
Formula: Na2KLiFe2+2Ti2Si8O24
Localities: Reported from at least 6 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Neptunite from California State Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Nesquehonite
Formula: MgCO3 · 3H2O
Localities: Reported from at least 6 localities in this region.
Newberyite
Formula: Mg(HPO4) · 3H2O
Locality: Paoha Island, Mono Lake, Mono Co., California, USA
Photo: © 2010, JGW. Newberyite from Paoha Island, Mono Lake, Mono Co., California, USA
Nickel
Formula: Ni
Locality: San Diego Co., California, USA
Nickeline
Formula: NiAs
Localities: Josephine Mine (Pine Tree Mine; Pine Tree Josephine Mine; Pine Tree and Josephine Mine), Pacific Mining Co. group, Bagby, Bagby-Mariposa-Mount Bullion-Whitlock District, Mother Lode Belt, Mariposa Co., California, USA
Stanislaus Mine, Carson Hill Gold Mining Company Mines (Carson Hill Mines), Melones, Carson Hill District (Melones District), Mother Lode Belt, Calaveras Co., California, USA
Unnamed Ni prospect [1], Calico, Calico District (Daggett District; Calico-Daggett area), Calico Mts (Calico Hills), San Bernardino Co., California, USA
Henshaw Quarry, Bloomington, San Bernardino Co., California, USA
Shotgun Creek Mine (Gill Mine; Primm and Dougherty group; Noble Electric Steel Company property), Sims Station, Klamath Mts, Shasta Co., California, USA
'Nickel-iron'
Localities: South Fork Smith River, Klamath Mts, Del Norte Co., California, USA
San Emigdio meteorite, San Emigdio Mts, Kern Co., California, USA
Valley Wells meteorite, Valley Wells (Rosalie; Valley Wells Ranch), Shadow Valley, San Bernardino Co., California, USA
Nimite
Formula: (Ni,Mg,Al)6((Si,Al)4O10)(OH)8
Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Nissonite (TL)
Formula: Cu2Mg2(PO4)2(OH)2 · 5H2O
Type Locality: Llanada Copper Mine, Llanada, Panoche Valley, Diablo Range, San Benito Co., California, USA
Reference: Mrose, M.E., Meyrowitz, R., Alfors, J.T., and Chesterman, C.W. (1967) Nissonite. American Mineralogist: 52: 927; Hey, CIM: 498.
Photo: © Brent Thorne. Nissonite from Llanada Copper Mine, Llanada, Panoche Valley, Diablo Range, San Benito Co., California, USA
Niter
Formula: KNO3
Localities: Reported from at least 14 localities in this region.
Nitratine
Formula: NaNO3
Localities: Reported from at least 32 localities in this region.
Nobleite (TL)
Formula: CaB6O9(OH)2 · 3H2O
Type Locality: Unnamed Nobleite locality [1], Ryan, Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA
Reference: Erd, R.C., J.F. McAllister & A.C. Vlisidis (1961), Nobleite, another new hydrous calcium borate from the Death Valley region, California: American Mineralogist: 46: 560-571.
Localities: Recorded from at least 7 other localities in this region.
Photo: © California Institute of Technology. Nobleite from Corkscrew Canyon Mine, Ryan, Furnace Creek District, Inyo Co., California, USA
Nontronite
Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Localities: Reported from at least 17 localities in this region.
Photo: © 2007 Peter Cristofono. Nontronite from Cody Switch, Kern Co., California, USA
Northupite (TL)
Formula: Na3Mg(CO3)2Cl
Type Locality: Searles Lake, San Bernardino Co., California, USA
Description: Occurs as nodules of micro-crystals; layers or veins of aggreagtes of fine crystals.
Reference: Foote, Warren M. (1895), Preliminary note on a new alkali mineral: American Journal of Science, 3rd. series: 50: 480; Smith, George Irving & D.V. Haines (1964), Character and distribution of nonclastic minerals in the Searles Lake evaporite deposit, California: USGS Bulletin 1181-P: 30; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 208; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 279, 340, 633; Tschermaks Min. Pet. Mitt. 22 (1975), 158.; Gale, Hoyt Stoddard (1915), Mineralogy of the Searles Lake deposits in Salines in the Owens, Searles, and Panamint basins, southeastern California: USGS Bulletin 580: 296-308
Localities: Recorded from at least 1 other locality in this region.
Photo: © S.Mirete. Northupite from Searles Lake, San Bernardino Co., California, USA
Nsutite
Formula: (Mn4+,Mn2+)(O,OH)2
Locality: Blue Jay Mine (Blue Jay claim; Blue Bird Mine; McKnight; McKnight), Three Forks, Coastal Range, Trinity Co., California, USA
'Obsidian'
Localities: Reported from at least 20 localities in this region.
Photo: © 2004 Peter Cristofono. Obsidian from Mono Co., California, USA
'Obsidian var: Mahogany Obsidian'
Locality: Mono Co., California, USA
Photo: © 2006 Peter Cristofono. Mahogany Obsidian from Mono Co., California, USA
'Obsidian var: Rainbow Obsidian'
Locality: Unnamed obsidian occurrence (1), Davis Creek, Warner Mts, Modoc Co., California, USA
Photo: Rainbow Obsidian from Unnamed obsidian occurrence, Davis Creek, Warner Mts, Modoc Co., California, USA
'Ochre'
Localities: Reported from at least 8 localities in this region.
Offretite
Formula: KCaMg(Si13Al5)O36 · 15H2O
Localities: Santa Monica Mts, Los Angeles/Ventura Co., California, USA
Unnamed Zeolite occurrence (1), Elk Creek, Crescent City area, Coastal Range, Del Norte Co., California, USA
Canwood Street site, Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Kanan Road (Ferrierite locality), Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA ? (more information)
Photo: © Van King. Offretite from Canwood Street site, Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Okenite
Formula: Ca10Si18O46 · 18H2O
Locality: Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Oldhamite
Formula: (Ca,Mg)S
Locality: Sutter's Mill meteorite, Sutter Mill Bar and River (Old Sutter Mill site), Coloma, Coloma District, West Belt, El Dorado Co., California, USA
Olivenite
Formula: Cu2(AsO4)(OH)
Localities: Antelope Neck Mine (Antelope Mine), Loyalton, Sierra Co., California, USA
Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Zinc Hill Mine (Utacaia group; Colorado group; Darwin Zinc prospect), Zinc Hill, Zinc Hill District, Argus Mts (Argus Range), Inyo Co., California, USA
Ibex Mine (Ibex Mine Arcturus; Arcturus Mine), Black Mts, Amargosa Range, Inyo Co., California, USA
'Olivine'
Formula: (Mg,Fe2+)2SiO4
Localities: Reported from at least 103 localities in this region.
'Olivine basalt'
Locality: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
'Olivine-gabbro'
Locality: Schoebel occurrence, Bullion Mts (Bullion Range), San Bernardino Co., California, USA
Omphacite
Formula: (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
Localities: Reported from at least 10 localities in this region.
Photo: Omphacite from Berkeley Hills, Berkeley, Alameda Co., California, USA
Opal
Formula: SiO2 · nH2O
Localities: Reported from at least 220 localities in this region.
Photo: © Christopher N. Wentzell. Opal from Opal Mountain, San Bernardino Co., California, USA
Opal var: Cherry Opal
Formula: SiO2 · nH2O
Locality: Opal Mountains Agate Field prospect (Black Mountain; Black Mtn), Opal Mountain, San Bernardino Co., California, USA
Opal var: Chrysopal
Formula: SiO2 · nH2O
Locality: Unnamed Semi-precious Gemstone occurrence [1], Venice Hills, Ivanhoe, Tulare Co., California, USA
Opal var: Common Opal
Formula: SiO2 · nH2O
Locality: White Rock Mine, Chinese Station, Tuolumne Co., California, USA
Photo: © Matthew Stanley - 2015. Common Opal from White Rock Mine, Chinese Station, Tuolumne Co., California, USA
Opal var: Fire Opal
Formula: SiO2 · nH2O
Localities: Reported from at least 6 localities in this region.
Photo: © Christopher N. Wentzell. Fire Opal from Barnett Opal Mine, Silica Gem claims, Last Chance Canyon, El Paso Mountains District, El Paso Mts, Kern Co., California, USA
Opal var: Hyalite
Formula: SiO2 · nH2O
Localities: Rolling Oaks Drive, Thousand Oaks, Santa Monica Mts, Ventura Co., California, USA
White Knob Quarry, Lucerne Valley, Lucerne Valley Limestone District, San Bernardino Co., California, USA
Opal var: Lemon Opal
Formula: SiO2 · nH2O
Locality: McLaughlin Mine (Manhattan Mine), Knoxville, Knoxville District, Napa Co., California, USA
Opal var: Milk Opal
Formula: SiO2 · nH2O
Locality: Unnamed Opal occurrence [1], Rosamond, Mojave-Rosamond District (Mojave District), Kern Co., California, USA
Opal var: Moss Opal
Localities: Unnamed Opal occurrence, Mountains East of Fresno, Fresno, Fresno Co., California, USA
Moss Opal occurrence, California City, Kern Co., California, USA
Chrysoprase and Moss Opal deposits, River Pines, Fiddletown District (Oleta District), Amador Co., California, USA
White Rock Mine, Chinese Station, Tuolumne Co., California, USA
Photo: © Matthew Stanley - 2015. Moss Opal from White Rock Mine, Chinese Station, Tuolumne Co., California, USA
Opal var: Opal-AN
Formula: SiO2 · nH2O
Localities: Reported from at least 9 localities in this region.
Photo: © Brent Thorne 2007. Opal-AN from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Opal var: Opal-Agate
Formula: SiO2 · nH2O
Locality: Midway Well, Paymaster District, Chocolate Mts, Imperial Co., California, USA
Opal var: Opal-C
Formula: SiO2 · nH2O
Localities: Elgin Mine, Wilbur Springs, Sulphur Creek District (Sulfur Creek District; Wilbur Springs District), Coast Ranges, Colusa Co., California, USA
Elgin Mine area, Elgin Mine, Wilbur Springs, Sulphur Creek District (Sulfur Creek District; Wilbur Springs District), Coast Ranges, Colusa Co., California, USA
Opal var: Opaline
Formula: SiO2 · nH2O
Locality: Napa Co., California, USA
Opal var: Prase Opal
Formula: SiO2 · nH2O
Locality: Knoxville, Knoxville District, Napa Co., California, USA
Opal var: Precious Fire Opal
Locality: Barnett Opal Mine, Silica Gem claims, Last Chance Canyon, El Paso Mountains District, El Paso Mts, Kern Co., California, USA
Opal var: Precious Opal
Formula: SiO2 · nH2O
Localities: McLaughlin Mine (Manhattan Mine), Knoxville, Knoxville District, Napa Co., California, USA
Nowak Mine (Last Chance Opal Mine; Nowak Fire Opal Mine; Cowden Mine), Silica Gem claims, Last Chance Canyon, El Paso Mountains District, El Paso Mts, Kern Co., California, USA
Barnett Opal Mine, Silica Gem claims, Last Chance Canyon, El Paso Mountains District, El Paso Mts, Kern Co., California, USA
Photo: © Christopher N. Wentzell. Precious Opal from Barnett Opal Mine, Silica Gem claims, Last Chance Canyon, El Paso Mountains District, El Paso Mts, Kern Co., California, USA
Opal var: Resin Opal
Formula: SiO2 · nH2O
Localities: Unnamed Opal occurrence [1], Rosamond, Mojave-Rosamond District (Mojave District), Kern Co., California, USA
White Rock Mine, Chinese Station, Tuolumne Co., California, USA
Photo: © Matthew Stanley - 2015. Resin Opal from White Rock Mine, Chinese Station, Tuolumne Co., California, USA
Opal var: Wood Opal
Formula: SiO2 · nH2O
Localities: Petrified Forest, Ricardo, El Paso Mountains District, El Paso Mts, Kern Co., California, USA
Volcano, Volcano District, Amador Co., California, USA
Unspecified Opal occurrence, Santa Maria, Santa Barbara Co., California, USA
Unknown diamond occurrence [1], Volcano, Volcano District, Amador Co., California, USA
'Opalite'
Localities: Paramount Mine (Paramount Quicksilver Inc.; Perini Quicksilver property), Potato Peak, Bridgeport District, Bodie Hills, Mono Co., California, USA
Harrison Mine (New England Mine; Grizzly Mine; January Mine; Ruby Mine), Knoxville area, Knoxville District, Coast Ranges, Yolo Co., California, USA
Afton Canyon, Afton, Cady Mts, San Bernardino Co., California, USA
Goffs, San Bernardino Co., California, USA
'Orbicular Jasper'
Locality: Unspecified Gemstone occurrence, Paradise Valley, Santa Cruz Mts, Santa Clara Co., California, USA
Photo: © Mineralogical Research Co.. Orbicular Jasper from Unspecified Gemstone occurrence, Paradise Valley, Santa Cruz Mts, Santa Clara Co., California, USA
'Ore'
Localities: Reported from at least 16 localities in this region.
Orickite (TL)
Formula: 2CuFeS2 · H2O
Type Locality: Coyote Peak, Coastal Range, Humboldt Co., California, USA
Colour: Bright pale yellow
Description: Resembles chalcopyrite.
Reference: Erd, R.C. and G.K. Czamanske (1981) Orickite and coyoteite, two new sulfide minerals. American Mineralogist; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 92; American Mineralogist: (1983) 68: 245-254.
Orpiment
Formula: As2S3
Localities: Reported from at least 10 localities in this region.
Photo: © 2009 JSS. Orpiment from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
'Orthochrysotile'
Localities: New Melones Dam, West Belt, Calaveras Co., California, USA
San Francisco, San Francisco Co., California, USA
Orthoclase
Formula: K(AlSi3O8)
Localities: Reported from at least 85 localities in this region.
Photo: © g.slak 2009. Orthoclase from Carmelita Mine, Chihuahua Valley, Warner Springs District, San Diego Co., California, USA
Orthojoaquinite-(Ce) (TL)
Formula: NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O
Type Locality: California State Gem Mine (Dallas Gem Mine; Benitoite Mine; Benitoite Gem Mine; Gem Mine), Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Habit: Unknown
Colour: Unknown
Reference: American Mineralogist (1982): 67: 809-816.
Localities: Recorded from at least 1 other locality in this region.
Orthoserpierite
Formula: Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O
Locality: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Photo: © Brent Thorne 2017. Orthoserpierite from Santa Rosa Mine, Malpais Mesa, Inyo Mts, Inyo Co., California, USA
Osakaite
Formula: Zn4(SO4)(OH)6 · 5H2O
Locality: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Osarsite (TL)
Formula: (Os,Ru)AsS
Type Locality: Gold Bluff beach, Gold Bluffs, Orick, Orick District, Humboldt Co., California, USA
Reference: Snetsinger, K.G. (1972) Osarsite, a new osmium-ruthenium sulfarsenide from California. American Mineralogist: 57: 1029; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 63.
Osmium
Formula: (Os,Ir,Ru)
Localities: Reported from at least 19 localities in this region.
Photo: Osmium from Del Norte Co., California, USA
Osmium var: Iridosmine
Formula: (Os,Ir)
Localities: Reported from at least 14 localities in this region.
Photo: © Michael Cline. Iridosmine from Unnamed PGE occurrence, China Flat, Willow Creek, Willow Creek District, Klamath Mts, Humboldt Co., California, USA
Ottoite (TL)
Formula: Pb2TeO5
Type Locality: Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Habit: monoclinic
Colour: light yellow to cream
Reference: Joe Marty specimens; EDS and XRD confirmed. Kampf, A.R., Housley, R.M., Mills, S.J., Marty, J., Thorne, B. (2010): Lead-tellurium oxysalts from Otto Mountain near Baker, California: I. Ottoite, Pb2TeO5, a new mineral with chains of tellurate octahedra. American Mineralogist, 95, 1329-1336.
Localities: Recorded from at least 2 other localities in this region.
Photo: © JM 2010. Ottoite from Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Ottrélite
Formula: (Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Localities: Unnamed Ottrélite occurrence [1], South Park District, Panamint Mts (Panamint Range), Inyo Co., California, USA
Ottrelite Schist occurrence, Yreka, Siskiyou Co., California, USA
Owyheeite
Formula: Ag3+xPb10-2xSb11+xS28, -0.13 < x > +0.20
Locality: McAlpine Mine, Peñon Blanco Peak, Coulterville District, Mother Lode Belt, Tuolumne Co., California, USA
Oxy-schorl
Formula: Na(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3O
Locality: Himalaya Mine (Himalaya dikes; Himalaya pegmatite), Gem Hill, Mesa Grande District, San Diego Co., California, USA
Oyelite
Formula: Ca10Si8B2O29 · 12.5H2O
Locality: Crestmore quarries, Crestmore, Riverside Co., California, USA
Pääkkönenite
Formula: Sb2AsS2
Locality: Cryo-Genie Mine (Cindy B-Cryogenie claim; Lost Valley Truck Trail prospect), Warner Springs, Warner Springs District, San Diego Co., California, USA
Photo: © Rob Lavinsky & irocks.com. Pääkkönenite from Cryo-Genie Mine, Warner Springs, Warner Springs District, San Diego Co., California, USA
Pabstite (TL)
Formula: Ba(Sn,Ti)(Si3O9)
Type Locality: Pacific Limestone Products Quarry (Kalkar Quarry), Santa Cruz, Santa Cruz Co., California, USA
Colour: Colourless to white; pink tinge (fresh break)
Description: Associated with other Sn-bearing minerals in contact zone of the limestone; disseminated anhedral grains (commonly less than 2 mm diameter, aggregates to 10 mm).
Reference: Gross, Eugene Bischoff & John E.N. Wainwright (1964), Barium-tin-titanium silicate having the benitoite structure (abstract): Geological Society of America, Cordilleran Section Meeting Program, Seattle, March 1964: 36; Gross, E.B., Wainwright, J.E.N., and Evans, B.W. (1965) Pabstite, the tin analogue of benitoite. American Mineralogist: 50: 1164-1169; Gross, E.B., Chesterman, C.W., Dunning, G.E., and Cooper, J.F. (1967) Mineralogy of the Kalkar quarry, Santa Cruz, California. California Division Mines and Geol. Special Report 92: 3-10; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 467.
Photo: © Knut Eldjarn. Pabstite from Pacific Limestone Products Quarry, Santa Cruz, Santa Cruz Co., California, USA
Palladium
Formula: (Pd,Pt)
Localities: Sacramento River, Redding, Redding District, Shasta Co., California, USA
Yuba River placers, North San Juan, North San Juan District, Nevada Co., California, USA
Yuba River placers (Yuba Mine), Hammonton, Hammonton District (Yuba River District; Yuba Gold Field; Yuba Dredge Field; Yuba Consolidated Gold Fields), Yuba Co., California, USA
Palygorskite
Formula: (Mg,Al)5(Si,Al)8O20(OH)2 · 8H2O
Localities: New Melones Dam, West Belt, Calaveras Co., California, USA
Pomona Freeway and North-bound Orange Freeway roadcuts, Pomona area, Puente Hills, Los Angeles Co., California, USA
Plumbago Mine (Marion Mine; Croesus Mine; Standard Extension Mine; Crafts Clute Mine; Enterprise Mine; Hope Mine; Gold Beater Mine), Plumbago, Alleghany District (Forest District), Sierra Co., California, USA
Four Corners No. 3; 4 & 5 wells, Kramer Junction (Beecher's Corners; Beechers Corners; Four Corners), East Kramer Borate area (East Kramer Colemanite area), East Kramer District, San Bernardino Co., California, USA
Photo: © Maggie Wilson. Palygorskite from New Melones Dam, West Belt, Calaveras Co., California, USA
Parabutlerite
Formula: Fe3+(SO4)(OH) · 2H2O
Locality: Coso Mine (Devil's Kitchen; Atlas; Lynch & Lynch; Nicol; Walley-Mickey & Wheeler), Coso Hot Springs deposit, Coso Hot Springs, Coso District (New Coso District), Coso Mts (Coso Range), Inyo Co., California, USA
Paragonite
Formula: NaAl2(AlSi3O10)(OH)2
Localities: Reed Station, Tiburon Uplands Nature Preserve, Tiburon Peninsula, Marin Co., California, USA
Unnamed Graphite-Phyllosilicate occurrence [1], Rock Canyon, Georgetown, Georgetown District, East Segment Mother Lode, Mother Lode Belt, El Dorado Co., California, USA
Oriental Mine (Alta Mine), 16 to 1 Mine (Sixteen-to-One Mine; Original Sixteen-to-One Mine), Alleghany, Alleghany District (Forest District), Sierra Co., California, USA
Moccasin, New Melones Dam, West Belt, Calaveras Co., California, USA
Blue Lady Mine (Blue Tourmaline claim; Blue Bell deposit; Blue Bell mine; Exposition claim; Panama claim; San Diego claim; San Diego group), Chihuahua Valley, Warner Springs District, San Diego Co., California, USA ? (more information)
Pararealgar
Formula: As4S4
Localities: Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Photo: © 2009, JGW. Pararealgar from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Paratacamite
Formula: Cu3(Cu,Zn)(OH)6Cl2
Localities: Bird Nest E3, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Noonday Mine (Grant Mine), Shoshone Mines (Shoshone Mines group; Shoshone Mine group; Grant Mine; Mabel Mine; Black Prince Mine), Upper Noonday Camp, Nopah Range, Inyo Co., California, USA
Photo: © Brent Thorne 2013. Paratacamite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Paratimroseite (TL)
Formula: Pb2Cu4(TeO6)2(H2O)2
Type Locality: Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Habit: orthorhombic
Colour: fluorescent green
Reference: A. R. Kampf, S. J. Mills, R. M. Housley, J. Marty, and B. Thorne (2010): Lead-tellurium oxysalts from Otto Mountain near Baker, California: V. Timroseite, Pb2Cu52+(Te6+O6)2(OH)2, and paratimroseite, Pb2Cu42+(Te6+O6)2(H2O)2, two new tellurates with Te-Cu polyhedral sheets. American Mineralogist, 95, 1560-1568.; Joe Marty specimens
Localities: Recorded from at least 1 other locality in this region.
Photo: © JM 2010. Paratimroseite from Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Pargasite
Formula: {Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Localities: Crestmore quarries, Crestmore, Riverside Co., California, USA
Unnamed Skarn occurrence [1], Lakeshore, Fresno Co., California, USA
Jensen Quarry (Oak Quarry), Jurupa, Jurupa Mts, Riverside Co., California, USA
Twin Lakes Limestone deposit, Lower Twin Lake, Twin Lakes, Fresno Co., California, USA
Unnamed diorite pegmatite [1], Fort Irwin, San Bernardino Co., California, USA (more information)
Photo: © Rob Lavinsky & irocks.com. Pargasite from Jensen Quarry, Jurupa, Jurupa Mts, Riverside Co., California, USA
Parisite-(Ce)
Formula: CaCe2(CO3)3F2
Locality: Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Parsettensite
Formula: (K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2O
Localities: Russian River, Russian River District, Coast Range, Sonoma Co., California, USA
Buckeye Mine (Buckeye Mines; Wright Mine), Mount Oso, Ladd-Buckeye District, Diablo Range, Stanislaus Co., California, USA
Monumental Mine, Grass Flat, Port Wine District, Sierra Co., California, USA
Pauladamsite (TL)
Formula: Cu4(SeO3)(SO4)(OH)4·2H2O
Type Locality: Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Reference: Kampf, A.R., Mills, S.J., Nash, B.P. (2016): Pauladamsite, Cu4(SeO3)(SO4)(OH)4·2H2O, a new mineral from the Santa Rosa mine, Darwin district, California, USA. Mineralogical Magazine, 80: 949-958.
Photo: © Brent Thorne 2017. Pauladamsite from Santa Rosa Mine, Malpais Mesa, Inyo Mts, Inyo Co., California, USA
Pavonite
Formula: AgBi3S5
Localities: Lucky Lucy Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
St. Charles Mine, Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
'Pearceite-Polybasite Series'
Locality: Hayden Hill Mine, Hayden Hill, Hayden Hill, Hayden Hill District, Lassen Co., California, USA
Pecoraite
Formula: Ni3(Si2O5)(OH)4
Localities: New Idria Mine (New Idria group; New Hope vein), Idria (New Idria), New Idria District, Diablo Range, San Benito Co., California, USA
Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Culver-Baer Mine (Culver-Baer Quicksilver Mine; Buckman Mine), North Fork Little Sulphur Creek, Cloverdale, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Photo: © Brent Thorne 2013. Pecoraite from Culver-Baer Mine, North Fork Little Sulphur Creek, Cloverdale, West Mayacmas District, Mayacmas Mts, Sonoma Co., California, USA
Pectolite
Formula: NaCa2Si3O8(OH)
Localities: Reported from at least 17 localities in this region.
'Pegmatite'
Localities: Reported from at least 24 localities in this region.
Pellyite
Formula: Ba2Ca(Fe,Mg)2Si6O17
Localities: Trumbull Peak Ba-silicate deposit, Trumbull Peak, Clearing House, Clearing House District, East Belt, Mariposa Co., California, USA
Esquire No. 8 claim (Lander's Gillespite locality), Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Esquire No. 7 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Photo: © 2009, JGW. Pellyite from Esquire No. 8 claim, Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Pentahydrite
Formula: MgSO4 · 5H2O
Localities: The Geysers, West Mayacmas District, Mayacmas Mts (Mayacamas Mts), Sonoma Co., California, USA
Alma Mine (Alma Pyrite Mine), Leona Heights deposit, Leona Heights, Oakland, Oakland Hills, Diablo Range, Alameda Co., California, USA
Photo: © 2008, JGW, courtesy of Photographic Guide to Mineral Species. Pentahydrite from Alma Mine, Leona Heights deposit, Leona Heights, Oakland, Oakland Hills, Diablo Range, Alameda Co., California, USA
Pentlandite
Formula: (Fe,Ni)9S8
Localities: Reported from at least 10 localities in this region.
Periclase
Formula: MgO
Localities: Reported from at least 6 localities in this region.
'Peridotite'
Localities: Dish Hill Crater (Dish Hill; Siberia Hill; Siberia Hill Crater), Trojan, San Bernardino Co., California, USA
Peridotite Canyon, High Plateau Mountain, Rockland, Diamond Creek District, Klamath Mts, Del Norte Co., California, USA
Perite
Formula: PbBiClO2
Localities: Reported from at least 8 localities in this region.
Photo: © 2008 by Jesse Crawford. Perite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Perovskite
Formula: CaTiO3
Localities: Reported from at least 7 localities in this region.
Photo: © SMS 2008. Perovskite from Perovskite Peak, Santa Rita Peak, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Pertsevite-(F)
Formula: Mg2(BO3)(F,OH)
Locality: Twin Lakes Limestone deposit, Lower Twin Lake, Twin Lakes, Fresno Co., California, USA
Petalite
Formula: LiAl(Si4O10)
Localities: Anita Mine (MS 6859), Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill), Pala, Pala District, San Diego Co., California, USA
Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Clark Mine, Rincon Mountain, Rincon, Rincon District, San Diego Co., California, USA
Peterbaylissite (TL)
Formula: (Hg+2)1.5(CO3)(OH) · 2H2O
Type Locality: Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
Reference: ROBERT, A.C., ERCIT, T.S., GROAT, L.A., CRIDDLE, A.J., ERD, R.C. & WILLIAMS, R.S. (1995) Peterbaylissite, Hg1+3(CO3)(OH)2H2O, a new mineral species from Clear Creek claim, San Benito County, California. Canadian Mineralogist 33, 47-53.
'Petrified Wood'
Localities: Reported from at least 28 localities in this region.
Photo: © Tamás Ungvári 2005. Petrified Wood from Fresno Co., California, USA
'Petroleum'
Localities: Harrison Mine (New England Mine; Grizzly Mine; January Mine; Ruby Mine), Knoxville area, Knoxville District, Coast Ranges, Yolo Co., California, USA
Reed Mine (California Mine; Royal Mine; Soda Springs Mine), Knoxville area, Knoxville District, Coast Ranges, Yolo Co., California, USA
Petzite
Formula: Ag3AuTe2
Localities: Reported from at least 25 localities in this region.
Photo: Petzite from McAlpine Mine, Peñon Blanco Peak, Coulterville District, Mother Lode Belt, Tuolumne Co., California, USA
Pharmacoalumite
Formula: KAl4(AsO4)3(OH)4 · 6.5H2O
Locality: Antelope Neck Mine (Antelope Mine), Loyalton, Sierra Co., California, USA
Pharmacolite
Formula: Ca(HAsO4) · 2H2O
Locality: O.K. Mine, San Gabriel Canyon, San Gabriel Mts, Los Angeles Co., California, USA
Pharmacosiderite
Formula: KFe3+4(AsO4)3(OH)4 · 6-7H2O
Localities: Lodi No. 4 Mine (Lodi No. 4 claim), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Murdock Mine [2] (Plumas Jumbo Mine), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Phenakite
Formula: Be2SiO4
Localities: Vanderberg-Katerina pegmatites (Vanderburg-Katerina dikes; Vanderburg-Katerina pegmatites), Katerina Mine (Ashley mine; Caterina mine; Catherin mine; Catherina mine; Katrina mine), Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill), Pala, Pala District, San Diego Co., California, USA
Vanderberg-Katerina pegmatites (Vanderburg-Katerina dikes; Vanderburg-Katerina pegmatites), Vanderberg Mine (MS 5391; Naylor Rock; Naylor-Vanderburg mine; Sickler group; Vandenburg mine; Vanderburg mine), Hiriart Mountain (Hariat Mtn; Harriot Mtn; Heriart Mtn; Heriot Mtn; Hiriat Hill), Pala, Pala District, San Diego Co., California, USA
Photo: Phenakite from Katerina Mine, Hiriart Mountain, Pala, Pala District, San Diego Co., California, USA
'Phengite'
Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Localities: Reported from at least 50 localities in this region.
'Phillipsite'
Localities: Reported from at least 21 localities in this region.
Photo: © Dick Dionne. Phillipsite from Table Mountain Zeolite occurrence, Squaw Mountain, Shadow Mts [1], San Bernardino Co., California, USA
Phillipsite-Na
Formula: (Na,K,Ca0.5,Ba0.5)4-7[Al4-7Si12-9O32] · 12H2O
Localities: U.S. Borax open pit (Boron pit), U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Canwood Street site, Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Photo: © Van King. Phillipsite-Na from Canwood Street site, Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Localities: Reported from at least 34 localities in this region.
Photo: © SMS 2012. Phlogopite from Glen Avon Quarry, Glen Avon, Riverside Co., California, USA
Phosgenite
Formula: Pb2CO3Cl2
Locality: Silver Sprout Mine (Silver Sprout vein), Inyo Co., California, USA
Phosphohedyphane
Formula: Ca2Pb3(PO4)3Cl
Localities: Reported from at least 9 localities in this region.
Photo: © Brent Thorne 2010. Phosphohedyphane from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
'Phosphorite'
Localities: Carmel Valley, Carmel-by-the-Sea, Santa Lucia Mts (Santa Lucia Range), Monterey Co., California, USA
Amador Co., California, USA
Phosphosiderite
Formula: FePO4 · 2H2O
Localities: Elizabeth R. Mine (Hazel W. claim), Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Stewart Mine (MS 6162; Stewart Lithia mine), Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Champion Mine (White Mountain Mine; Jeffrey Mine; Diaspore; Vulcanus; Black Eagle; Champion Sillimanite Mine; Champion Andalusite Mine; Vulcanite Mine; Vulcanite & Vulcanus No. 156; Black Eagle & Vulcanus Nos. 8 and 9 No. 157), White Mountain Peak, White Mts, Mono Co., California, USA
Pack Rat Mine, Tule Mountain (Mount Tule; Tulley Mountain), Jacumba, Jacumba District, San Diego Co., California, USA
Pala Chief Mine (Chief mine; MS 6452; Salmons mine), Chief Mountain, Pala, Pala District, San Diego Co., California, USA
Photo: © Leon Hupperichs. Phosphosiderite from Stewart Mine, Tourmaline Queen Mountain, Pala, Pala District, San Diego Co., California, USA
Phurcalite
Formula: Ca2(UO2)3(PO4)2O2 · 7H2O
Localities: Unnamed Diatomite deposit [1], Shale Hills, Kern Co., California, USA
Taft to Blackwell Corners area, Taft, Kern Co., California, USA
Pickeringite
Formula: MgAl2(SO4)4 · 22H2O
Localities: Reported from at least 9 localities in this region.
Photo: © Rock Currier. Pickeringite from California Rand No. 2 Mine, Red Mountain [town], Rand District, San Bernardino Co., California, USA
Piemontite
Formula: {Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
Localities: Reported from at least 29 localities in this region.
Photo: © Alfredo Petrov. Piemontite from Whitewater, Riverside Co., California, USA
Pigeonite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Locality: Los Angeles Martian meteorite, Los Angeles Co., California, USA
Pingguite
Formula: Bi6Te4+2O13
Locality: Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Photo: © Brent Thorne 2007. Pingguite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Pinnoite
Formula: Mg[B2O(OH)6]
Locality: Eagle Borax Spring, Death Valley, Inyo Co., California, USA
Pirssonite (TL)
Formula: Na2Ca(CO3)2 · 2H2O
Type Locality: Searles Lake, San Bernardino Co., California, USA
Reference: Pratt, Joseph Hyde (1896), On northupite; pirssonite, a new mineral; Gaylussite and hanksite from Borax Lake, San Bernardino County, California: American Journal of Science, 4th. series: 2: 126; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 208; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 279.; Gale, Hoyt Stoddard (1915), Mineralogy of the Searles Lake deposits in Salines in the Owens, Searles, and Panamint basins, southeastern California: USGS Bulletin 580: 296-308
Localities: Recorded from at least 3 other localities in this region.
Photo: © Karl Volkman 04/05. Pirssonite from Searles Lake, San Bernardino Co., California, USA
Pitticite
Formula: (Fe, SO4, AsO4, H2O) ?
Localities: Carlin Mine, Jamestown, Jamestown District, Mother Lode Belt, Tuolumne Co., California, USA
Unnamed Fe occurrence [1], Devil Gulch, Peachtree Bar, Hite Cove District, East Belt, Mariposa Co., California, USA
Plancheite
Formula: Cu8(Si8O22)(OH)4 · H2O
Localities: Panamint Mts (Panamint Range), Inyo Co., California, USA
Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Platinum
Formula: Pt
Localities: Reported from at least 118 localities in this region.
Photo: © Karl Volkman 12/07. Platinum from Siskiyou Co., California, USA
Platinum var: Ferroan Platinum
Formula: (Pt,Fe)
Localities: Reported from at least 12 localities in this region.
'Platinum-Group Elements'
Locality: Beegum Creek placer (Beesum Creek), Platina, Harrison Gulch District, Klamath Mts, Shasta Co., California, USA
Plattnerite
Formula: PbO2
Localities: Reported from at least 8 localities in this region.
Photo: © Brent Thorne 2007. Plattnerite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
'Plessite'
Locality: Goose Lake meteorite, Goose Lake, Modoc Co., California, USA
Plombièrite
Formula: [Ca4Si6O16(OH)2 · 2H2O]·(Ca·5H2O)
Locality: Crestmore quarries, Crestmore, Riverside Co., California, USA
Photo: © 2008, JGW. Plombièrite from Commercial Quarry, Sky Blue Hill, Crestmore quarries, Crestmore, Riverside Co., California, USA
Plumbogummite
Formula: PbAl3(PO4)(PO3OH)(OH)6
Localities: Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Reward Mine (Brown Monster Mine; Ruth; Hirsch and Telescope group; Brown Monster-Reward; Graham-Jones; Eclipse; Golden West claims; Hidden Treasure group; F. D. Roosevelt claims), Reward, Russ District, Inyo Mts (Inyo Range), Inyo Co., California, USA
Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA ? (more information)
Cerro Gordo Mine, Cerro Gordo, Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA ? (more information)
Photo: © Brent Thorne 2008. Plumbogummite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Plumbojarosite
Formula: Pb0.5Fe3+3(SO4)2(OH)6
Localities: Reported from at least 15 localities in this region.
Photo: Plumbojarosite from Pedry Mine, Mount General, Hinkley, Barstow District, San Bernardino Co., California, USA
Plumbophyllite (TL)
Formula: Pb2Si4O10 · H2O
Type Locality: Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Habit: Monoclinic sprays with plumbotsumite.
Colour: Clear to light blue.
Reference: American Mineralogist, Volume 94, pages 1198–1204, 2009
Photo: © JM 2009. Plumbophyllite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Plumbotellurite
Formula: Pb(TeO3)
Locality: Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA - erroneously reported
Plumbotsumite
Formula: Pb13(CO3)6(Si10O27) · 3H2O
Localities: Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Blue Bell Mine (Blue Bell claims; Hard Luck Mine; Hard Luck claims; Atkinson), Zzyzx (Fort Soda; Soda; Soda Springs; Zzyzx Mineral Spring Resort), Soda Mts, Silver Lake District, San Bernardino Co., California, USA
SW cut, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Bird Nest E3, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA ? (more information)
Aga Mine, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA ? (more information)
Photo: © Brent Thorne 2009. Plumbotsumite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Pokrovskite
Formula: Mg2(CO3)(OH)2
Localities: KCA Quarry, San Benito Co., California, USA
Lytton, Sonoma Co., California, USA
Photo: © 2007, JGW. Pokrovskite from Lytton, Sonoma Co., California, USA
Pollucite
Formula: (Cs,Na)2(Al2Si4O12) · 2H2O
Localities: Cryo-Genie Mine (Cindy B-Cryogenie claim; Lost Valley Truck Trail prospect), Warner Springs, Warner Springs District, San Diego Co., California, USA
Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala District, San Diego Co., California, USA
Himalaya Mine (Himalaya dikes; Himalaya pegmatite), Gem Hill, Mesa Grande District, San Diego Co., California, USA
Unnamed Pegmatite occurrence, Ranchita, Volcan Mts, San Diego Co., California, USA
Polybasite
Formula: [(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
Localities: Reported from at least 8 localities in this region.
Photo: © R.D. Green. Polybasite from Advance Mine, Colorado Hill, Loope, Monitor - Mogul District, Alpine Co., California, USA
Polycrase-(Y)
Formula: Y(Ti,Nb)2(O,OH)6
Locality: Southeast of Pearblossom, Pearblossom, Los Angeles Co., California, USA
'Polylithionite-1M'
Locality: California Blue Mine, Yucca Valley, San Bernardino Co., California, USA
'Porcellanite'
Locality: San Luis Obispo, San Luis Obispo Co., California, USA
'Porphyritic rhyolite'
Locality: Greene Mine (Green's Mine; Bartlett VI; Cal group), Clark Mountain, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
'Porphyry'
Localities: Reported from at least 8 localities in this region.
Posnjakite
Formula: Cu4(SO4)(OH)6 · H2O
Localities: Lodi No. 4 Mine (Lodi No. 4 claim), Adams Peak, Last Chance District, Diamond Mts, Plumas Co., California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo Co., California, USA
Potassic-magnesio-fluoro-arfvedsonite
Formula: [(K,Na)][Na2][Mg4Fe3+][Si8O22][(F,OH)2]
Locality: Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Powellite
Formula: Ca(MoO4)
Localities: Reported from at least 37 localities in this region.
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Localities: Reported from at least 29 localities in this region.
Photo: © Bill Dameron. Prehnite from Pine Creek Mine, Scheelite, Bishop District, Inyo Co., California, USA
Priceite
Formula: Ca2B5O7(OH)5 · H2O
Localities: Reported from at least 17 localities in this region.
Photo: © Rruff Project. Priceite from Mott prospect, Twenty Mule Team Canyon, Furnace Creek District, Inyo Co., California, USA
Probertite (TL)
Formula: NaCaB5O7(OH)4 · 3H2O
Type Locality: Baker Mine, U.S. Borax Mine (Pacific West Coast Borax; Pacific Coast Borax Co.; Boron Mine; Boron open pit; U.S. Borax and Chemical Corporation Mine; Kramer Mine; Kramer pit; Baker Mine), Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Reference: Amer.Min.(1928) 13, 452-453; Nickel & Nichols (1991) Mineral Reference Maual; Frondel C, Morgan V (1956) Inderite and gerstleyite from the Kramer borate district, Kern County, California. American Mineralogist 41, 839-843
Localities: Recorded from at least 17 other localities in this region.
Photo: © Peter Haas. Probertite from U.S. Borax open pit, U.S. Borax Mine, Kramer Borate deposit, Boron, Kramer District, Kern Co., California, USA
Proustite
Formula: Ag3AsS3
Localities: Reported from at least 23 localities in this region.
Pseudoboleite
Formula: Pb31Cu24Cl62(OH)48
Locality: Bird Nest E3, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Pseudobrookite
Formula: Fe2TiO5
Localities: Kramer Borate deposit, Boron, Kramer District (Kramer Borate District), Kern Co., California, USA
Rolling Oaks Drive, Thousand Oaks, Santa Monica Mts, Ventura Co., California, USA
Lobo Canyon, Agoura Hills, Santa Monica Mts, Los Angeles Co., California, USA
Pseudolaueite
Formula: Mn2+Fe3+2(PO4)2(OH)2 · 8H2O
Locality: Elder Canyon deposits, Elder Canyon, Anza-Borrego Desert State Park, San Diego Co., California, USA
'Pseudoleucite'
Locality: Mountain Pass Mine (Mountain Pass deposit; Mountain Pass Mine and mill; Bastnaesite deposit; Bastnäsite deposit; Mountain Pass carbonatite), Mountain Pass, Mountain Pass District, Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA
Pseudomalachite
Formula: Cu5(PO4)2(OH)4
Localities: Reported from at least 14 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Pseudomalachite from Katerina Mine, Hiriart Mountain, Pala, Pala District, San Diego Co., California, USA
'Pseudowollastonite'
Formula: CaSiO3
Locality: Unspecified Wollastonite occurrence [2], South Fork Kaweah River, Kaweah River, Sequoia National Park, Tulare Co., California, USA
'Psilomelane'
Localities: Reported from at least 201 localities in this region.
Photo: © 2008 Brandy Naugle. Psilomelane from Groce Mine, Arlington Black Jack deposit, McCoy Spring, Arlington District, McCoy Mts, Riverside Co., California, USA
Pucherite
Formula: Bi(VO4)
Localities: Reported from at least 10 localities in this region.
'Pumice'
Localities: Reported from at least 88 localities in this region.
'Pumpellyite'
Localities: Reported from at least 23 localities in this region.
Photo: © Rock Currier. Pumpellyite from Sonoma Co., California, USA
Pumpellyite-(Fe2+)
Formula: Ca2Fe2+Al2(Si2O7)(SiO4)(OH)2 · H2O
Locality: Diablo Range, San Benito Co., California, USA
Pumpellyite-(Mg)
Formula: Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O
Localities: Laytonville Quarry (Longvale; Longvale Quarry), Laytonville, Coastal Range, Mendocino Co., California, USA
Russian River, Cloverdale area, Mendocino Co., California, USA
Coalinga Asbestos Mine (Coalinga Mine; Coalinga Asbestos deposit), Coalinga area, Diablo Range, Fresno Co., California, USA
Purpurite
Formula: (Mn3+,Fe3+)PO4
Localities: Reported from at least 8 localities in this region.
Photo: © Rob Lavinsky & irocks.com. Purpurite from Pack Rat Mine, Tule Mountain, Jacumba, Jacumba District, San Diego Co., California, USA
Pyrargyrite
Formula: Ag3SbS3
Localities: Reported from at least 46 localities in this region.
Photo: © Michael D. Cline. Pyrargyrite from Advance Mine, Colorado Hill, Loope, Monitor - Mogul District, Alpine Co., California, USA
Pyrite
Formula: FeS2
Localities: Reported from at least 1128 localities in this region.
Photo: © 2001 John H. Betts. Pyrite from Darwin, Darwin District, Darwin Hills, Inyo Co., California, USA
Pyrite var: Auriferous Pyrite
Formula: FeS2
Localities: Reported from at least 14 localities in this region.
Pyroaurite
Formula: Mg6Fe3+2(OH)16[CO3] · 4H2O
Localities: Victor claim (Victor Mine), Clear Creek area, Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA
United States Mint site, Duboce Street near Market Street, San Francisco, San Francisco Co., California, USA
Unnamed Ni occurrence [1], Archer Camp, New Idria District, Diablo Range, Fresno Co., California, USA
Fort Point, San Francisco, San Francisco Co., California, USA
'Pyroaurite-2H'
Formula: Mg6Fe3+2(OH)16(CO3) · 4H2O
Localities: Lytton, Sonoma Co., California, USA
US Highway 101 roadcut, Healdsburg, Sonoma Co., California, USA
Fort Point, San Francisco, San Francisco Co., California, USA
Photo: © DSW 2014. Pyroaurite-2H from Lytton, Sonoma Co., California, USA
Pyrochlore Group
Formula: A2Nb2(O,OH)6Z
Localities: Jensen Quarry (Oak Quarry), Jurupa, Jurupa Mts, Riverside Co., California, USA
Madonna Mia group, Chilcoot area, Diamond Mts, Lassen Co., California, USA
Pyrochlore Supergroup
Formula: A2-mB2X6-wY1-n
Localities: Unnamed REE pegmatite [1], Rainbow Wells, Marl Mts, San Bernardino Co., California, USA
Unnamed U occurrence, Hector, Cady Mts, San Bernardino Co., California, USA
Pyrochlore Supergroup var: Betafite (of Hogarth 1977)
Formula: A2-mB2X6-wY1-n
Localities: Unnamed REE pegmatite [1], Rainbow Wells, Marl Mts, San Bernardino Co., California, USA
Unnamed U occurrence, Hector, Cady Mts, San Bernardino Co., California, USA
Photo: Betafite (of Hogarth 1977) from Cady Mts, San Bernardino Co., California, USA
Pyrochroite
Formula: Mn(OH)2
Localities: Advance Mine (Zaca Mine; Zaca group; North Advance Mine; Collosus Mine; Colorado No. 2 Mine; Tarshish Mine), Colorado Hill, Loope (Monitor; Loopeville), Monitor - Mogul District, Alpine Co., California, USA
Alum Rock Park, East Foothills, Black Wonder District, Diablo Range, Santa Clara Co., California, USA
Monitor - Mogul District, Alpine Co., California, USA
Pyrolusite
Formula: MnO2
Localities: Reported from at least 158 localities in this region.
Photo: © Brent Thorne 2012. Pyrolusite from Bird Nest drift, Otto Mountain, Baker, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Pyromorphite
Formula: Pb5(PO4)3Cl
Localities: Reported from at least 25 localities in this region.
Photo: © Brent Thorne 2008. Pyromorphite from Blue Bell Mine, Zzyzx, Soda Mts, Silver Lake District, San Bernardino Co., California, USA
Pyrope
Formula: Mg3Al2(SiO4)3
Localities: Unnamed Eclogite outcrop (2), Jenner, Russian River District, Coast Range, Sonoma Co., California, USA
Visalia, Tulare Co., California, USA
Santa Catalina Island, Los Angeles Co., California, USA
Photo: © Patrick Godsil. Pyrope from Jenner, Russian River District, Coast Range, Sonoma Co., California, USA
Pyrophanite
Formula: Mn2+TiO3
Locality: Manga-Chrome Mine (Manga Chrome; Magna-Chrome Mine; Duggan Mine; Steams and Owens [?]), Limekiln, Spenceville District, Nevada Co., California, USA
Pyrophyllite
Formula: Al2Si4O10(OH)2
Localities: Reported from at least 31 localities in this region.
Photo: © 2006 John Sobolewski. Pyrophyllite from Champion Mine, White Mountain Peak, White Mts, Mono Co., California, USA
Pyrostilpnite
Formula: Ag3SbS3
Localities: Randsburg area occurrences, Randsburg, Rand District (Randsburg District), Rand Mts, Kern Co., California, USA
Kelly Mine, Randsburg, Rand District (Randsburg District), Rand Mts, Kern Co., California, USA
California Rand No. 2 Mine (California Rand Silver Mine; California Rand Mine; Kelly Mine; Kelly Rand Mine), Red Mountain [town] (Osdick), Rand District (Randsburg District), San Bernardino Co., California, USA
Photo: © Van King. Pyrostilpnite from Kelly Mine, Randsburg, Rand District, Rand Mts, Kern Co., California, USA
'Pyroxene Group'
Localities: Reported from at least 49 localities in this region.
Pyroxmangite
Formula: MnSiO3
Locality: Big Indian Mine (Big Indian deposit), Government Peak, Rand District (Randsburg District), Rand Mts, Kern Co., California, USA
Pyrrhotite
Formula: Fe7S8
Localities: Reported from at least 191 localities in this region.
Photo: © JEFS. Pyrrhotite from Big Creek, Rush Creek deposit, Big Creek-Rush Creek District, Fresno Co., California, USA
Pyrrhotite var: Nickeloan Pyrrhotite
Formula: Fe7S8
Localities: Friday Mine, Julian, Julian District, San Diego Co., California, USA
Hummer Mine, Schneider Hill, Callahan District (Scott River District), Klamath Mts, Siskiyou Co., California, USA
Quartz
Formula: SiO2
Reference: Clark (1993), "Hey's Mineral Index".
Localities: Recorded from at least 4999 other localities in this region.
Photo: © Rob Lavinsky & irocks.com. Quartz from Cryo-Genie Mine, Warner Springs, Warner Springs District, San Diego Co., California, USA
Quartz var: Agate
Localities: Reported from at least 55 localities in this region.
Photo: © Dott. Geol. Marco Barsanti - geoman1@tin.it. Agate from Gem Hill, Rosamond Hills, Rosamond, Mojave-Rosamond District, Kern Co., California, USA
Quartz var: Agate-Jasper
Formula: SiO2
Localities: Reported from at least 6 localities in this region.
Photo: © 2011 Joseph A. Freilich, LLC. All Rights Reserved. Agate-Jasper from Cambria Mine, Cambria, Cambria-Oceanic District, Santa Lucia Mts, San Luis Obispo Co., California, USA
Quartz var: Amberine
Formula: SiO2
Locality: Death Valley, Inyo Co., California, USA
Quartz var: Amethyst
Formula: SiO2
Localities: Reported from at least 20 localities in this region.
Photo: © 2009 Erik M. Cordova. Amethyst from Purple Heart Mine, Kingston Peak, Kingston Range District, Kingston Range, San Bernardino Co., California, USA
Quartz var: Blue Chalcedony
Formula: SiO2
Locality: Unknown diamond occurrence [1], Volcano, Volcano District, Amador Co., California, USA
Quartz var: Brecciated Agate
Formula: SiO2
Locality: Wiley Well, Riverside Co., California, USA
Quartz var: Bull Quartz
Formula: SiO2
Locality: Carmelita Mine (Big Spring mine; Blue Gem claim; Crest Gem mine; Elinor deposit; Elinor mine; Estudillo mine; French Pete mine; MS 6130; Peter Cabat mine), Chihuahua Valley, Warner Springs District, San Diego Co., California, USA
Quartz var: Carnelian
Localities: Nipomo, San Luis Obispo Co., California, USA
Marin Co., California, USA
Rodeo Beach, Golden Gate National Recreation Area, Marin City, Marin Co., California, USA
Quartz var: Chalcedony
Formula: SiO2
Localities: Reported from at least 174 localities in this region.
Photo: © The-Vug.com. Chalcedony from Calico District, Calico Mts, San Bernardino Co., Californ