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California State Gem Mine (Dallas Gem Mine; Benitoite Mine; Benitoite Gem Mine; Gem Mine), Santa Rita Peak, New Idria District, Diablo Range, San Benito Co., California, USA

This page kindly sponsored by Jim Bean
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Latitude & Longitude (WGS84): 36° 20' 9'' North , 120° 36' 19'' West
Latitude & Longitude (decimal): 36.33611,-120.60528
GeoHash:G#: 9q6nxwccj
Locality type:Mine
Köppen climate type:Csb : Warm-summer Mediterranean climate


A former gemstone and specimen occurrence/mine located in the SW¼NE¼ sec. 25, T18S, R12E, MDM, 1.2 km (0.8 miles; 4,000 feet) SSW of Santa Rita Peak (coordinates of record), at the headwaters of the San Benito River, on formerly private (patented) land, now turned over to the state of California. MRDS database stated accuracy for this location is 100 meters.

Mineralization is a gemstone deposit. The deposit is comprised of natrolite veins cutting a glaucophane schist inclusion in a serpentinite body. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains).

Note: The majority of specimens from this locality have been prepared by dissolving away the enclosing natrolite with hydrochloric acid.

Workings include unspecified underground openings (the topo map reflects a large shaded area of mining activity with 1 adit symbol labeled "gem mine" at this point).

Alternative Label Names

This is a list of additional names that have been recorded for mineral labels associated with this locality in the minID database. This may include previous versions of the locality name hierarchy from mindat.org, data entry errors, and it may also include unconfirmed sublocality names or other names that can only be matched to this level.

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
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
California State Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
Benitoite Gem Mine, San Benito Co, California, USA
Dallas Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
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 County, California, United States
Upstream San Benito River from Dallas Gem Mine, Dallas Gem Mine area, San Benito River headwaters area, New Idria District, Diablo Range, San Benito Co., California, USA
California State Gem Mine
BENITOITE GEM MINE, SAN BENITO COUNTRY, CALIFORNIA
Dallas Gem Mine, San Benito County, California

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Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


31 valid minerals. 6 (TL) - type locality of valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Description: Occurs as a vein mineral.
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: 360; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 64; Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452; William S. Wise (1982) Strontiojoaquinite and bario-orthojoaquinite: two new members of the joaquinite group . American Mineralogist 67:809-81
Aegirine
Formula: NaFe3+Si2O6
Habit: Stellate groups
Description: Occurs in albite with benitoite and natrolite as stellate groups.
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: 363; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 298; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 392.; William S. Wise (1982) Strontiojoaquinite and bario-orthojoaquinite: two new members of the joaquinite group . American Mineralogist 67:809-81
Albite
Formula: Na(AlSi3O8)
Description: Occurs as crystals up to 10 mm in druses of 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: 361; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 182; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 362; Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452.; William S. Wise (1982) Strontiojoaquinite and bario-orthojoaquinite: two new members of the joaquinite group . American Mineralogist 67:809-81
Analcime
Formula: Na(AlSi2O6) · H2O
Reference: Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452
Anatase
Formula: TiO2
Colour: Pale brown
Description: Occurs as a few minute pale brown crystals inn the benitoite vein.
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: 380; 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: 72.
Andradite
Formula: Ca3Fe3+2(SiO4)3
Reference: Am Min 51:381-387
Andradite var: Melanite
Formula: Ca3Fe3+2(SiO4)3
Reference: Am Min 51:381-387
'Apatite'
Habit: prismatic
Colour: colorless
Fluorescence: none
Description: found associated with natrolite
Reference: Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452; Am Min 51:381-387
Aragonite
Formula: CaCO3
Description: Occurs as bunches and stringers in the country rock of the benitoite vein.
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: 363; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 82; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 216.
Baotite
Formula: Ba4Ti8Si4O28Cl
Description: Occurs replacing benitoite.
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 467.; William S. Wise (1982) Strontiojoaquinite and bario-orthojoaquinite: two new members of the joaquinite group . American Mineralogist 67:809-81
Bario-orthojoaquinite (TL)
Formula: (Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O
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.
Barioperovskite (TL)
Formula: BaTiO3
Habit: Unknown
Colour: Unknown
Reference: IMA website - Proposals approved in January 2007
Benitoite (TL)
Formula: BaTi(Si3O9)
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.
Calcite
Formula: CaCO3
Reference: Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452
Chalcocite
Formula: Cu2S
Description: Occurs as small crystals scattered throughout natrolite in the vein.
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: 359; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 130.
'Chlorite Group'
Reference: Am Min 51:381-387
Chrysotile
Formula: Mg3(Si2O5)(OH)4
Reference: No reference listed
Covellite
Formula: CuS
Reference: Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. The Mineralogical Record 8, 450; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 98, 100.
'Crossite'
Reference: Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452; William S. Wise (1982) Strontiojoaquinite and bario-orthojoaquinite: two new members of the joaquinite group . American Mineralogist 67:809-81
Delindeite
Formula: (Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O
Reference: John Veevaert Collection
Digenite
Formula: Cu9S5
Habit: Equant with poorly developed faces.
Description: Occurs as small crystals to 9.5 mm.
Reference: Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 169; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 98; Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452.
Diopside
Formula: CaMgSi2O6
Reference: Am Min 51:381-387
Djurleite
Formula: Cu31S16
Habit: Well-formed hexagonally shaped dipyramids
Description: Occurs as crystals to 8 mm.
Reference: Potter, R.W. and Evans, H.T. (1976) Definitive X-ray powder data for covellite, anilite, djurleite and chalcocite. USGS Jour. Res.: 4: 205-212; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 98; Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452.
Fresnoite
Formula: Ba2Ti(Si2O7)O
Description: Occurs replacing benitoite.
Reference: Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 467.; William S. Wise (1982) Strontiojoaquinite and bario-orthojoaquinite: two new members of the joaquinite group . American Mineralogist 67:809-81
'commodity:Gemstones'
Reference:  
Glaucophane
Formula: ◻[Na2][Mg3Al2]Si8O22(OH)2
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: 360; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 70; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 403.
'Glaucophane schist'
Reference: Louderback, George Davis & Walter C. Blasdale (1909), Benitoite, its mineralogy, paragenesis and mode of occurrence: University of California, Department of Geological Sciences Bulletin
Joaquinite-(Ce) (TL)
Formula: NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O
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
Jonesite (TL)
Formula: Ba4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
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.
'commodity:Mineral specimens'
Reference:  
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Colour: White
Description: Occurs as a large vein of granulated material.
Reference: 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; 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, 357; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 102, 277; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 372; Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452; William S. Wise (1982) Strontiojoaquinite and bario-orthojoaquinite: two new members of the joaquinite group . American Mineralogist 67:809-81
Neptunite
Formula: Na2KLiFe2+2Ti2Si8O24
Reference: 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; Arnold, Ralph (1908), Notes on the occurrence of the recently described gem material, benitoite: Science, new series: 27: 312-314; Ford, William Ebenezer (1909), Neptunite crystals from San Benito, California: American Journal of Science, 4th. Series: 27: 235-240; Louderback, George Davis & Walter C. Blasdale (1909), Benitoite, its mineralogy, paragenesis and mode of occurrence: University of California, Department of Geological Sciences Bulletin: 5: 354; Schaller, Waldemar Theodore (1911d), Notes on neptunite: USGS Bulletin 490: 55-57; Buttgenbach, H. (1937-38), Sur un crystal de neptunite: Soc. Geol.. de Belgique Liege Annales: 61: 324-325; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 102; Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. Mineralogical Record 8, 442-452; William S. Wise (1982) Strontiojoaquinite and bario-orthojoaquinite: two new members of the joaquinite group . American Mineralogist 67:809-81
Orthojoaquinite-(Ce) (TL)
Formula: NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O
Habit: Unknown
Colour: Unknown
Reference: American Mineralogist (1982): 67: 809-816.
Perovskite
Formula: CaTiO3
Reference: Am Min 51:381-387
'Psilomelane'
Description: Occurs as minor stringers and coatings.
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: 363; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 298.
Pyrite
Formula: FeS2
Reference: benitoite.com
Serandite
Formula: NaMn2+2Si3O8(OH)
Colour: Cream-coloured to brownish
Description: Occurs as the remnants of crystals 1 to 2 mm long on the surface of vein walls.
Reference: 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: 410.
'Serpentinite'
Reference: Louderback, George Davis & Walter C. Blasdale (1909), Benitoite, its mineralogy, paragenesis and mode of occurrence: University of California, Department of Geological Sciences Bulletin
Silver
Formula: Ag
Habit: wire
Description: Found with Benitoite and Djurleite on only one known specimen.
Reference: benitoite.com
'Unnamed (Ba Titanate)'
Formula: BaTi2O5
Reference: Ma, C. and G. R. Rossman (2008) "Barioperovskite, a new mineral from the Benitoite Mine, California": American Mineralogist: 93, 154-157.
'Unnamed (Ba Titanate II)'
Formula: BaTi3O7
Reference: Ma, C. and G. R. Rossman (2008) "Barioperovskite, a new mineral from the Benitoite Mine, California": American Mineralogist: 93, 154-157.
Vesuvianite
Formula: (Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Reference: Am Min 51:381-387

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Silver1.AA.05Ag
Group 2 - Sulphides and Sulfosalts
'Chalcocite'2.BA.05Cu2S
'Covellite'2.CA.05aCuS
'Digenite'2.BA.10Cu9S5
'Djurleite'2.BA.05Cu31S16
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
'Anatase'4.DD.05TiO2
'Barioperovskite' (TL)4.CC.30BaTiO3
Perovskite4.CC.30CaTiO3
Group 5 - Nitrates and Carbonates
'Aragonite'5.AB.15CaCO3
'Calcite'5.AB.05CaCO3
Group 9 - Silicates
'Actinolite'9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Aegirine'9.DA.25NaFe3+Si2O6
'Albite'9.FA.35Na(AlSi3O8)
'Analcime'9.GB.05Na(AlSi2O6) · H2O
'Andradite'9.AD.25Ca3Fe3+2(SiO4)3
var: Melanite9.AD.25Ca3Fe3+2(SiO4)3
'Baotite'9.CE.15Ba4Ti8Si4O28Cl
'Bario-orthojoaquinite' (TL)9.CE.25(Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O
'Benitoite' (TL)9.CA.05BaTi(Si3O9)
'Chrysotile'9.ED.15Mg3(Si2O5)(OH)4
'Delindeite'9.BE.60(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O
'Diopside'9.DA.15CaMgSi2O6
'Fresnoite'9.BE.15Ba2Ti(Si2O7)O
'Glaucophane'9.DE.25◻[Na2][Mg3Al2]Si8O22(OH)2
'Joaquinite-(Ce)' (TL)9.CE.25NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O
'Jonesite' (TL)9.DJ.30Ba4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Neptunite9.EH.05Na2KLiFe2+2Ti2Si8O24
Orthojoaquinite-(Ce) (TL)9.CE.25NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O
Serandite9.DG.05NaMn2+2Si3O8(OH)
Vesuvianite9.BG.35(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Chlorite Group'-
'Crossite'-
'Glaucophane schist'-
Psilomelane-
Serpentinite-
Unnamed (Ba Titanate II)-BaTi3O7
Unnamed (Ba Titanate)-BaTi2O5

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Silver1.1.1.2Ag
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
Digenite2.4.7.3Cu9S5
Djurleite2.4.7.2Cu31S16
AmXp, with m:p = 1:1
Covellite2.8.12.1CuS
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Barioperovskite (TL)4.3.3.4BaTiO3
Perovskite4.3.3.1CaTiO3
AX2
Anatase4.4.4.1TiO2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Andradite51.4.3b.1Ca3Fe3+2(SiO4)3
Group 55 - SOROSILICATES Si2O7 Groups,Generally with no Additional Anions
Si2O7 Groups, Generally with No Additional Anions with cations in [8] and lower coordination
Fresnoite55.4.2.1Ba2Ti(Si2O7)O
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] and/or >[4] coordination
Delindeite56.2.6c.2(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Vesuvianite58.2.4.1(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Group 59 - CYCLOSILICATES Three-Membered Rings
Three-Membered Rings, anhydrous, no other anions
Benitoite (TL)59.1.1.2BaTi(Si3O9)
Group 60 - CYCLOSILICATES Four-Membered Rings
Four-Membered Rings, as Titanosilicates
Baotite60.1.2.1Ba4Ti8Si4O28Cl
Bario-orthojoaquinite (TL)60.1.1b.3(Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O
Joaquinite-(Ce) (TL)60.1.1a.1NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O
Orthojoaquinite-(Ce) (TL)60.1.1b.1NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with Al substituted rings
Jonesite (TL)61.2.2.1Ba4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Aegirine65.1.3c.2NaFe3+Si2O6
Diopside65.1.3a.1CaMgSi2O6
Single-Width Unbranched Chains, W=1 with chains P=3
Serandite65.2.1.5NaMn2+2Si3O8(OH)
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Glaucophane66.1.3c.1◻[Na2][Mg3Al2]Si8O22(OH)2
Group 70 - INOSILICATES Column or Tube Structures
Column or Tube Structures with linked chains forming cages
Neptunite70.4.1.1Na2KLiFe2+2Ti2Si8O24
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Chrysotile71.1.5.1Mg3(Si2O5)(OH)4
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Rocks, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Andradite
var: Melanite
-Ca3Fe3+2(SiO4)3
'Apatite'-
Aragonite-CaCO3
'Chlorite Group'-
'Crossite'-
'Glaucophane schist'-
'Psilomelane'-
'Serpentinite'-
'Unnamed (Ba Titanate II)'-BaTi3O7
'Unnamed (Ba Titanate)'-BaTi2O5

List of minerals for each chemical element

HHydrogen
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H AnalcimeNa(AlSi2O6) · H2O
H Bario-orthojoaquinite(Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O
H ChrysotileMg3(Si2O5)(OH)4
H Delindeite(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O
H Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
H Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O
H JonesiteBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
H NatroliteNa2Al2Si3O10 · 2H2O
H Orthojoaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O
H SeranditeNaMn22+Si3O8(OH)
H Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
LiLithium
Li NeptuniteNa2KLiFe22+Ti2Si8O24
BBoron
B Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
CCarbon
C AragoniteCaCO3
C CalciteCaCO3
OOxygen
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O AegirineNaFe3+Si2O6
O AlbiteNa(AlSi3O8)
O AnalcimeNa(AlSi2O6) · H2O
O AnataseTiO2
O AndraditeCa3Fe23+(SiO4)3
O AragoniteCaCO3
O BaotiteBa4Ti8Si4O28Cl
O Bario-orthojoaquinite(Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O
O BarioperovskiteBaTiO3
O BenitoiteBaTi(Si3O9)
O CalciteCaCO3
O ChrysotileMg3(Si2O5)(OH)4
O Delindeite(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O
O DiopsideCaMgSi2O6
O FresnoiteBa2Ti(Si2O7)O
O Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
O Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O
O JonesiteBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
O Andradite (var: Melanite)Ca3Fe23+(SiO4)3
O NatroliteNa2Al2Si3O10 · 2H2O
O NeptuniteNa2KLiFe22+Ti2Si8O24
O Orthojoaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O
O PerovskiteCaTiO3
O SeranditeNaMn22+Si3O8(OH)
O Unnamed (Ba Titanate)BaTi2O5
O Unnamed (Ba Titanate II)BaTi3O7
O Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
FFluorine
F Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O
F Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
NaSodium
Na AegirineNaFe3+Si2O6
Na AlbiteNa(AlSi3O8)
Na AnalcimeNa(AlSi2O6) · H2O
Na Delindeite(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O
Na Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Na Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O
Na JonesiteBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
Na NeptuniteNa2KLiFe22+Ti2Si8O24
Na Orthojoaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O
Na SeranditeNaMn22+Si3O8(OH)
Na Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
MgMagnesium
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg ChrysotileMg3(Si2O5)(OH)4
Mg DiopsideCaMgSi2O6
Mg Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Mg Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
AlAluminium
Al AlbiteNa(AlSi3O8)
Al AnalcimeNa(AlSi2O6) · H2O
Al Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Al JonesiteBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
Al NatroliteNa2Al2Si3O10 · 2H2O
Al Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
SiSilicon
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si AegirineNaFe3+Si2O6
Si AlbiteNa(AlSi3O8)
Si AnalcimeNa(AlSi2O6) · H2O
Si AndraditeCa3Fe23+(SiO4)3
Si BaotiteBa4Ti8Si4O28Cl
Si Bario-orthojoaquinite(Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O
Si BenitoiteBaTi(Si3O9)
Si ChrysotileMg3(Si2O5)(OH)4
Si Delindeite(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O
Si DiopsideCaMgSi2O6
Si FresnoiteBa2Ti(Si2O7)O
Si Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Si Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O
Si JonesiteBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
Si Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Si NatroliteNa2Al2Si3O10 · 2H2O
Si NeptuniteNa2KLiFe22+Ti2Si8O24
Si Orthojoaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O
Si SeranditeNaMn22+Si3O8(OH)
Si Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
SSulfur
S ChalcociteCu2S
S CovelliteCuS
S DigeniteCu9S5
S DjurleiteCu31S16
S PyriteFeS2
ClChlorine
Cl BaotiteBa4Ti8Si4O28Cl
KPotassium
K JonesiteBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
K NeptuniteNa2KLiFe22+Ti2Si8O24
CaCalcium
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca AndraditeCa3Fe23+(SiO4)3
Ca AragoniteCaCO3
Ca CalciteCaCO3
Ca DiopsideCaMgSi2O6
Ca Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Ca PerovskiteCaTiO3
Ca Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
TiTitanium
Ti AnataseTiO2
Ti BaotiteBa4Ti8Si4O28Cl
Ti Bario-orthojoaquinite(Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O
Ti BarioperovskiteBaTiO3
Ti BenitoiteBaTi(Si3O9)
Ti Delindeite(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O
Ti FresnoiteBa2Ti(Si2O7)O
Ti Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O
Ti JonesiteBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
Ti NeptuniteNa2KLiFe22+Ti2Si8O24
Ti Orthojoaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O
Ti PerovskiteCaTiO3
Ti Unnamed (Ba Titanate)BaTi2O5
Ti Unnamed (Ba Titanate II)BaTi3O7
MnManganese
Mn SeranditeNaMn22+Si3O8(OH)
FeIron
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe AegirineNaFe3+Si2O6
Fe AndraditeCa3Fe23+(SiO4)3
Fe Bario-orthojoaquinite(Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O
Fe Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O
Fe Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Fe NeptuniteNa2KLiFe22+Ti2Si8O24
Fe Orthojoaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O
Fe PyriteFeS2
Fe Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
CuCopper
Cu ChalcociteCu2S
Cu CovelliteCuS
Cu DigeniteCu9S5
Cu DjurleiteCu31S16
AgSilver
Ag SilverAg
BaBarium
Ba BaotiteBa4Ti8Si4O28Cl
Ba Bario-orthojoaquinite(Ba,Sr)4Fe2Ti2[Si4O12]2O2 · H2O
Ba BarioperovskiteBaTiO3
Ba BenitoiteBaTi(Si3O9)
Ba Delindeite(Na,K)2(Ba,Ca)2(Ti,Fe,Al)3(Si2O7)2O2(OH)2 · 2H2O
Ba FresnoiteBa2Ti(Si2O7)O
Ba Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O
Ba JonesiteBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
Ba Orthojoaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O
Ba Unnamed (Ba Titanate)BaTi2O5
Ba Unnamed (Ba Titanate II)BaTi3O7
CeCerium
Ce Joaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(OH,F) · H2O
Ce Orthojoaquinite-(Ce)NaBa2Ce2FeTi2[Si4O12]2O2(O,OH) · H2O

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Cretaceous
66 - 145 Ma



ID: 3190052
Mesozoic sedimentary rocks

Age: Cretaceous (66 - 145 Ma)

Lithology: Siltstone,sandstone,shale

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Late Jurassic - Middle Jurassic
145 - 174.1 Ma



ID: 2881475
Ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains)

Age: Jurassic (145 - 174.1 Ma)

Stratigraphic Name: Josephine Peridotite

Description: Ultramafic rocks, mostly serpentine. Minor peridotite, gabbro, and diabase. Chiefly Mesozoic unit 3

Comments: Coast Range ophiolite, Josephine ophiolite. Ultramafic rocks in Middle to Late Jurassic ophiolites of Coast Ranges and westernmost Klamath Mts. Original map source: Saucedo, G.J., Bedford, D.R., Raines, G.L., Miller, R.J., and Wentworth, C.M., 2000, GIS Data for the Geologic Map of California, California Department of Conservation, Division of Mines and Geology, CD-ROM 2000-07, scale 1:750,000.

Lithology: Major:{serpentinite}, Minor:{peridotite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Louderback, G.D. and Blasdale, W.C. (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.
Arnold, R. (1908) Notes on the occurrence of the recently described gem material, benitoite. Science, new series: 27: 312-314.
Ford, W.E. (1909) Neptunite crystals from San Benito, California. American Journal of Science, 4th. Series: 27: 235-240; […Zeitschr. Kristallographie, Band 46: 321-325 (1909)].
Louderback, G.D. and Blasdale, W.C. (1909) Benitoite, its mineralogy, paragenesis and mode of occurrence. University of California, Department of Geological Sciences Bulletin: 5: 331-380; 331, 354, 357, 359, 360, 361, 363, 376, 380.
Schaller, W.T. (1911) Notes on neptunite. USGS Bulletin 490: 55-57.
Anderson, Robert, and Robert W. Pack (1915) Geology and oil resources of the west border of the San Joaquin valley north of Coalinga, California, USGS Bulletin 603, 220 pp.: 208-209.
Laizure, Clyde McK (1926) San Benito County: California Journal of Mines and Geology, California Mining Bureau (Report 22): 22: 235.
Palache, C. and Foshag, W.F. (1932) The chemical nature of joaquinite. American Mineralogist: 17: 308-312.
Buttgenbach, H. (1937-38) Sur un crystal de neptunite. Annales de la Société Geologique de Belgique: 61: 324-325.
Averill, Charles V. (1947), Mines and mineral resources of San Benito County: California Journal of Mines and Geology, California Division Mines (Report 43): 43(1): 50.
Wright, L.A. (1957) Gemstones. California Division of Mines and Geology Bulletin 176: 211.
Murdoch, J. and Webb, R.W. (1966) Minerals of California, Centennial Volume (1866-1966). California Division Mines & Geology Bulletin 189: 64, 70, 72, 82, 102, 130, 169, 182, 234, 277, 279, 298, 309.
Potter, R.W. and Evans, H.T. (1976) Definitive X-ray powder data for covellite, anilite, djurleite and chalcocite. USGS Journal of Resources: 4: 205-212.
American Mineralogist (1976) 51: 381-387.
Wise, W.S and Gill, R.H. (1977) Minerals of the Benitoite Gem mine. The Mineralogical Record 8, 442-452.
Wise, W.S. and Pabst, A. (1977) Jonesite, a new mineral from the Benitoite Gem mine, San Benito County, California. The Mineralogical Record 8, 453-456.
Wise, W.S. (1982) Strontiojoaquinite and bario-orthojoaquinite: two new members of the joaquinite group. American Mineralogist 67: 809-81.
Pemberton, H.E. (1983) Minerals of California. Van Nostrand Reinhold Press: 98, 100, 216, 362, 372, 392, 399, 403, 410, 466, 467, 470, 472.
USGS (2005) Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10077217 & 10116165.
Ma, C. and Rossman, G.R. (2008) Barioperovskite, a new mineral from the Benitoite Mine, California. American Mineralogist: 93: 154-157.
U.S. Bureau of Mines Minerals Availability System/Mineral Industry Location System (MAS/MILS): file #0060690144.

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