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Clear Creek area, Picacho Peak, New Idria Mining District, Diablo Range, San Benito Co., California, USAi
Regional Level Types
Clear Creek areaArea
Picacho PeakPeak
New Idria Mining DistrictMining District
Diablo RangeMountain Range
San Benito Co.County
CaliforniaState
USACountry

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Key
Latitude & Longitude (WGS84):
36° North , 120° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~2km
Locality type:


Occurrences in the NW¼ (N½) sec. 12, T18S, R11E, MDM, and environs, along Clear Creek (Clear Creek Canyon), 5 to 6 miles SW of New Idria via road to the Hernandez Valley.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

16 valid minerals.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Description: Occurs as veins in schists; replaces jadeite or albite.
Reference: Coleman, R.G. (1961), Jadeite deposits of the Clear Creek area, New Idria District, San Benito County, California: Journal of Petrology: 2: 221; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 399.
'Almandine-Pyrope Series'
Description: In high-grade tectonic blocks of eclogite from New Idria serpentinite body. In high-grade tectonic blocks of garnet amphibolites from New Idria serpentinite body.
Reference: T. Tsujimori et al., Paper N° 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
Andradite
Formula: Ca3Fe3+2(SiO4)3
Andradite var: Melanite
Formula: Ca3Fe3+2(SiO4)3
'Chlorite Group'
Description: In high-grade tectonic blocks of eclogite from New Idria serpentinite body. In high-grade tectonic blocks of retrograde eclogite (blueschist facies) from New Idria serpentinite body. Replaces garnet.
Reference: T. Tsujimori et al., Paper N° 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
Chromite
Formula: Fe2+Cr3+2O4
Description: Occurs in serpentine belts.
Reference: Root, L.L. (1926) Twenty-second report of the State Mineralogist. California Mining Bureau Report 22, 610 pp.: 228; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 141.
'Clinopyroxene Subgroup'
Description: In high-grade tectonic blocks of garnet amphibolites from New Idria serpentinite body.
Reference: T. Tsujimori et al., Paper N° 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
Diopside
Formula: CaMgSi2O6
Description: In high-grade tectonic blocks of eclogite from New Idria serpentinite body. Exsolved lamellae in omphacite.
Reference: T. Tsujimori et al., Paper N° 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: T. Tsujimori et al., Paper N° 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
Glaucophane
Formula: ◻[Na2][Mg3Al2]Si8O22(OH)2
Reference: T. Tsujimori et al., Paper N° 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
'Hornblende'
Description: In high-grade tectonic blocks of garnet amphibolites from New Idria serpentinite body.
Reference: T. Tsujimori et al., Paper N° 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
Jadeite
Formula: Na(Al,Fe3+)Si2O6
Description: Eight large exposures along the canyon. Occurs as boulders and nodules in serpentine (high-grade tectonic blocks of retrograde eclogite [blueschist facies] from the New Idria serpentinite body). Replaces omphacite.
Reference: Anonymous (1950), Jadeite from Clear Creek, San Benito Co.: California Division of Mines, Mineral Information Service: 3(4): 2; Dake, H.C. (1951), The jadeite locality; The Mineralogist: 18: 188-190; Yoder, Hatten S., Jr. & Charles W. Chesterman (1951), Jadeite of San Benito County, California. California Division of Mines, Special Report 10-C: 3; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 239, 299, 309; T. Tsujimori et al., Paper N° 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
Lawsonite
Formula: CaAl2(Si2O7)(OH)2 · H2O
Description: Occurs in the contact zone of jadeite in high-grade tectonic blocks of retrograde eclogite (blueschist facies) from New Idria serpentinite body.
Reference: Yoder, Hatten S., Jr. & Charles W. Chesterman (1951), Jadeite of San Benito County, California. California Division of Mines, Special Report 10-C: 3; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 239, 299, 309; Tsujimori, T., et al (2005), Paper No. 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
Mercury
Formula: Hg
Reference: Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 273.
Montroydite
Formula: HgO
Habit: Bladed
Description: Occurs as crystals on/with mercury globules in cavities.
Reference: Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 273.
Omphacite
Formula: (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
Description: In high-grade tectonic blocks of eclogite from New Idria serpentinite body.
Reference: T. Tsujimori et al., Paper N° 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
'Pumpellyite'
Description: Occurs in the contact zones of jadeite in high-grade tectonic blocks of retrograde eclogite (blueschist facies) from New Idria serpentinite body. Replaces garnet with chlorite.
Reference: Yoder, Hatten S., Jr. & Charles W. Chesterman (1951), Jadeite of San Benito County, California. California Division of Mines, Special Report 10-C: 3; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 239, 299, 309; T. Tsujimori et al., Paper N° 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
Quartz
Formula: SiO2
Description: In high-grade tectonic blocks of eclogite from New Idria serpentinite body. In high-grade tectonic blocks of garnet amphibolites from New Idria serpentinite body.
Reference: T. Tsujimori et al., Paper N° 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
Rutile
Formula: TiO2
Description: In high-grade tectonic blocks of eclogite from New Idria serpentinite body.
Reference: T. Tsujimori et al., Paper N° 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Reference: Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 309.
Titanite
Formula: CaTi(SiO4)O
Vermiculite
Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Reference: Mikhail Ostrooumov and Alfredo Victoria Morales (2010) Mexican jadeite-bearing rock: a first mineralogical and gemmological approach. The Journal of Gemmology, Vol. 32, No. 1–4.
Zircon
Formula: Zr(SiO4)
Reference: Mikhail Ostrooumov and Alfredo Victoria Morales (2010) Mexican jadeite-bearing rock: a first mineralogical and gemmological approach. The Journal of Gemmology, Vol. 32, No. 1–4.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Mercury1.AD.05Hg
Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Montroydite4.AC.15HgO
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Andradite9.AD.25Ca3Fe3+2(SiO4)3
var: Melanite9.AD.25Ca3Fe3+2(SiO4)3
Diopside9.DA.15CaMgSi2O6
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Glaucophane9.DE.25◻[Na2][Mg3Al2]Si8O22(OH)2
Jadeite9.DA.25Na(Al,Fe3+)Si2O6
Lawsonite9.BE.05CaAl2(Si2O7)(OH)2 · H2O
Omphacite9.DA.20(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
Titanite9.AG.15CaTi(SiO4)O
Vermiculite9.EC.50Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Almandine-Pyrope Series'-
'Chlorite Group'-
'Clinopyroxene Subgroup'-
'Hornblende'-
'Pumpellyite'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Mercury1.1.7.1Hg
Group 4 - SIMPLE OXIDES
AX
Montroydite4.2.6.1HgO
AX2
Rutile4.4.1.1TiO2
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
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
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)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
Lawsonite56.2.3.1CaAl2(Si2O7)(OH)2 · H2O
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)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Jadeite65.1.3c.1Na(Al,Fe3+)Si2O6
Omphacite65.1.3b.1(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
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 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Vermiculite71.2.2d.3Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Almandine-Pyrope Series'-
Andradite
var: Melanite
-Ca3Fe3+2(SiO4)3
'Chlorite Group'-
'Clinopyroxene Subgroup'-
'Hornblende'-
'Pumpellyite'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn

List of minerals for each chemical element

HHydrogen
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
H LawsoniteCaAl2(Si2O7)(OH)2 · H2O
H Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
OOxygen
O TitaniteCaTi(SiO4)O
O Andradite (var: Melanite)Ca3Fe23+(SiO4)3
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O QuartzSiO2
O Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
O RutileTiO2
O Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
O LawsoniteCaAl2(Si2O7)(OH)2 · H2O
O JadeiteNa(Al,Fe3+)Si2O6
O DiopsideCaMgSi2O6
O Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
O MontroyditeHgO
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O ChromiteFe2+Cr23+O4
O ZirconZr(SiO4)
O VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
O AndraditeCa3Fe23+(SiO4)3
NaSodium
Na Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Na Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Na JadeiteNa(Al,Fe3+)Si2O6
MgMagnesium
Mg Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Mg Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Mg DiopsideCaMgSi2O6
Mg Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
AlAluminium
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Al Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Al LawsoniteCaAl2(Si2O7)(OH)2 · H2O
Al JadeiteNa(Al,Fe3+)Si2O6
Al Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Al VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
SiSilicon
Si TitaniteCaTi(SiO4)O
Si Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si QuartzSiO2
Si Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Si Glaucophane◻[Na2][Mg3Al2]Si8O22(OH)2
Si LawsoniteCaAl2(Si2O7)(OH)2 · H2O
Si JadeiteNa(Al,Fe3+)Si2O6
Si DiopsideCaMgSi2O6
Si Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si ZirconZr(SiO4)
Si VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Si AndraditeCa3Fe23+(SiO4)3
CaCalcium
Ca TitaniteCaTi(SiO4)O
Ca Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Ca LawsoniteCaAl2(Si2O7)(OH)2 · H2O
Ca DiopsideCaMgSi2O6
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca AndraditeCa3Fe23+(SiO4)3
TiTitanium
Ti TitaniteCaTi(SiO4)O
Ti RutileTiO2
CrChromium
Cr ChromiteFe2+Cr23+O4
MnManganese
Mn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe Andradite (var: Melanite)Ca3Fe23+(SiO4)3
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe Omphacite(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Fe JadeiteNa(Al,Fe3+)Si2O6
Fe Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe ChromiteFe2+Cr23+O4
Fe VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Fe AndraditeCa3Fe23+(SiO4)3
NiNickel
Ni Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
ZrZirconium
Zr ZirconZr(SiO4)
HgMercury
Hg MontroyditeHgO
Hg MercuryHg

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Anonymous (1950), Jadeite from Clear Creek, San Benito Co.: California Division of Mines, Mineral Information Service: 3(4): 2.
Chesterman, C.W. (1950a), Jadeite in San Benito County, California: Lapidary Journal: 4: 204-208.
Dake, H.C. (1951), The jadeite locality; The Mineralogist: 18: 188-190.
Yoder, Hatten S., Jr. & Charles W. Chesterman (1951), Jadeite of San Benito County, California. California Division of Mines, Special Report 10-C: 3.
Coleman, R.G. (1954), Optical and chemical study of jadeite from California: Geological Society of America Bulletin 65: 1241.
Coleman, R.G. (1956), Jadeite from San Benito County, California: Gems & Gemology: 8: 331-334, 490, 494.
Coleman, R.G. (1961) Jadeite Deposits of the Clear Creek Area, New Idria District, San Benito County, California. Journal of Petrology, Vol. 2, Part 2, pp. 209-47.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 88, 239, 273, 299, 309.
Prewitt, C.T. & Charles Wilson Burnham (1966), The crystal structure of jadeite, NaAlSi2O6. American Mineralogist: 51: 956-975.
Coleman, R.G. & J.R. Clark (1968), Pyroxenes in the blueschist facies of California: American Journal of Science: 266: 43-59.
Edgar, A.D., A. Mottana, and N.D. MacRae (1969) The chemistry of cell parameters of omphacite and related pyroxenes. Mineralogical Magazine: 37: 64, 67-68.
Ronzio, A.R. and Salmon, M. (1970) Trace elements in jade. Gems and Minerals: 389: 24-25, 45.
Cameron, M., S. Shigeho, C.T. Prewitt & J.J. Papike (1973), High temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite, spodumene and ureyite: American Mineralogist: 58: 594-618.
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 391, 488.
Tsujimori, T., et al (2005), Paper No. 21-6, The Geological Society of America, Joint Meeting Cordilleran Section and Pacific Section, 101st Annual Meeting, 29 April-1 May 2005, San Jose, California.

Localities in this Region


This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
 
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