Inyo County, California, USA (original) (raw)

Description: Occurs as veins of crystals a few millimeters diameter along fractures in granite and in the altered zone of the granite-limestone contact in epidote and limestone.

ⓘ Beudantite

Formula: PbFe3(AsO4)(SO4)(OH)6

Localities:

ⓘ Bianchite

Formula: Zn(SO4) · 6H2O

ⓘ 'Bindheimite'

Formula: Pb2Sb2O6O

Localities: Reported from at least 12 localities in this region.

Description: A common oxidation product in Pb ores.

ⓘ 'Biotite'

Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

Localities: Reported from at least 6 localities in this region.

ⓘ Bismoclite

Formula: BiOCl

ⓘ Bismuth

Formula: Bi

Localities:

Darwin Mining District, Darwin Hills, Inyo County, California, USA
Unnamed Bi occurrence [2], Antelope Spring, White Mountains, Inyo County, 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 Mining District, Darwin Hills, Inyo County, California, USA
Fernando Mine (St. Charles; Hayward; Darwin Silver project; Fernando and St Charles), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Durham Mine (Pacific Tungsten Co.), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Bismuthinite

Formula: Bi2S3

Localities: Reported from at least 8 localities in this region.

ⓘ Bismutite

Formula: (BiO)2CO3

Localities: Reported from at least 9 localities in this region.

ⓘ Blödite

Formula: Na2Mg(SO4)2 · 4H2O

ⓘ 'Bloodstone'

Formula: SiO2

Description: Occurs as pebbles.

ⓘ Bohdanowiczite

Formula: AgBiSe2

ⓘ Borax

Formula: Na2(B4O5)(OH)4 · 8H2O

Localities: Reported from at least 10 localities in this region.

ⓘ Bornite

Formula: Cu5FeS4

Localities: Reported from at least 16 localities in this region.

Description: Reported in ores.

ⓘ Botryogen

Formula: MgFe3+(SO4)2(OH) · 7H2O

ⓘ Boulangerite ?

Formula: Pb5Sb4S11

Description: A specimen in the University of California, Berkeley, collection was tentatively identified as boulangerite.

ⓘ Bournonite

Formula: PbCuSbS3

Localities:

Cerro Gordo Mine, Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Ubehebe Mine [1](Copper Bell Mine; Ubehebe Lead Mine), Teakettle Junction, Ubehebe Mining District, Cottonwood Mountains, Panamint Mts (Panamint Range), Inyo County, California, USA

ⓘ Boussingaultite

Formula: (NH4)2Mg(SO4)2 · 6H2O

ⓘ Boyleite

Formula: (Zn,Mg)SO4 · 4H2O

References:

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 (6) 949-958 doi:10.1180/minmag.2016.080.032

ⓘ Braunite

Formula: Mn2+Mn3+6(SiO4)O8

ⓘ Brianyoungite

Formula: Zn3(CO3,SO4)(OH)4

References:

ⓘ 'Britholite-(La)'

Formula: Ca2(La,Ce,Ca)3(SiO4,PO4)3(OH,F)

ⓘ Brochantite

Formula: Cu4(SO4)(OH)6

Localities: Reported from at least 14 localities in this region.

ⓘ Bromargyrite

Formula: AgBr

Localities:

Defense Mine, Lookout City, Lookout Mining District (Modoc Mining District), Argus Mts (Argus Range), Inyo County, California, USA
Reward Mine, Reward, Russ Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Burkeite

Formula: Na6(CO3)(SO4)2

Description: Occurs as efflorescences and saline crusts; in muds.

ⓘ Bustamite

Formula: CaMn2+(Si2O6)

ⓘ Butlerite

Formula: Fe3+(SO4)(OH) · 2H2O

ⓘ Calcite

Formula: CaCO3

Localities: Reported from at least 87 localities in this region.

ⓘ Calcite var. Iceland Spar

Formula: CaCO3

Localities:

Darwin Iceland Spar Mine, Ophir Mountain, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Calcite var. Limestone Onyx

Formula: CaCO3

Colour: banded red-brown

ⓘ Caledonite

Formula: Pb5Cu2(SO4)3(CO3)(OH)6

Localities: Reported from at least 15 localities in this region.

Colour: Bright green

ⓘ Carboborite

Formula: Ca2Mg[B(OH)4]2(CO3)2 · 4H2O

Description: Occurs as efflorescences after evaporation of mine seepages.

ⓘ Carminite

Formula: PbFe3+2(AsO4)2(OH)2

ⓘ Cassiterite ?

Formula: SnO2

Description: A somewhat questionable occurrence as reported nuggets (wood tin ?).

ⓘ Celestine

Formula: SrSO4

Localities: Reported from at least 10 localities in this region.

ⓘ Cerussite

Formula: PbCO3

Localities: Reported from at least 64 localities in this region.

ⓘ Cervantite

Formula: Sb3+Sb5+O4

Localities: Reported from at least 8 localities in this region.

Description: Occurs as an alteration product of Stibnite.

ⓘ 'Chabazite'

Localities:

Terry Mine (Terry Borate Mine; Terry pit; Terry deposit), Amargosa Valley, Inyo County, California, USA
Ash Meadows Zeolite deposit, Shoshone, Dublin Hills, Inyo County, California, USA
Lake Tecopa Zeolite deposit, Lake Tecopa Basin, Inyo County, California, USA
Unnamed Zeolite occurrence [1], Monte Blanco, Black Mountains, Amargosa Range, Inyo County, California, USA

ⓘ Chalcanthite

Formula: CuSO4 · 5H2O

Localities: Reported from at least 6 localities in this region.

ⓘ Chalcocite

Formula: Cu2S

Localities: Reported from at least 12 localities in this region.

ⓘ Chalcomenite

Formula: CuSeO3 · 2H2O

ⓘ Chalcopyrite

Formula: CuFeS2

Localities: Reported from at least 71 localities in this region.

Description: Occurs in rock shoots.

ⓘ 'Chevkinite Group'

ⓘ Chlorargyrite

Formula: AgCl

Localities: Reported from at least 22 localities in this region.

ⓘ Chlorargyrite var. Bromian Chlorargyrite

Formula: Ag(Cl,Br)

Localities:

Lee Mine (Emigrant Mine; Silver Reid prospect; Silver Reid Mine), Maltese Hill, Santa Rosa Hills, Lee Mining District, Inyo County, California, USA
Minnietta Mine (Minnietta Mines; Minietta Mine; Minneatta; St. John), Lookout City, Lookout Mining District (Modoc Mining District), Argus Mts (Argus Range), Inyo County, California, USA
Panamint Mines, Panamint (old Panamint), Panamint Mining District (Ballarat Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA
Indiana Mine, Swansea, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ 'Chlorite Group'

Localities: Reported from at least 6 localities in this region.

ⓘ Chloritoid

Formula: Fe2+Al2O(SiO4)(OH)2

References:

Whitney, D. L., Hirschmann, M., Miller, M. G. (1993) Zincian ilmenite-ecandrewsite from a pelitic schist, Death Valley, California, and the paragenesis of (Zn,Fe)TiO3 solid solution in metamorphic rocks. The Canadian Mineralogist, 31 (2). 425-436 doi:10.3749/1499-1276-31.2.425

ⓘ Chrysocolla

Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1

Localities: Reported from at least 43 localities in this region.

ⓘ Chrysotile

Formula: Mg3(Si2O5)(OH)4

Description: Occurs in dolomite.

ⓘ Cinnabar

Formula: HgS

Localities:

Coso Mine (Devil's Kitchen; Atlas; Lynch & Lynch; Nicol; Walley-Mickey & Wheeler), Coso Hot Springs deposit, Coso Hot Springs, Inyo County, California, USA
Last Chance Peak Mine (Last Chance Mountain Mine; El Capitan Mine; El Capitam Mine), Crater, Last Chance Range, Inyo County, California, USA
Chloride Cliff Mine, Chloride Cliff, Chloride City, Chloride Cliff Mining District (South Bullfrog Mining District), Funeral Mts (Funeral Range), Amargosa Range, Inyo County, California, USA
Wheeler Area Mine (Coso Mine), Coso Mine (Devil's Kitchen; Atlas; Lynch & Lynch; Nicol; Walley-Mickey & Wheeler), Coso Hot Springs deposit, Coso Hot Springs, Inyo County, California, USA

ⓘ Clausthalite

Formula: PbSe

ⓘ 'Clay minerals'

Localities: Reported from at least 20 localities in this region.

ⓘ Clinochlore

Formula: Mg5Al(AlSi3O10)(OH)8

Localities:

Pine Creek Mine (Black Monster Mine; Snow Queen Mine; Pine Creek Tungsten Mine & mill; Pine Creek apt plant; Pine Creek custom mill), Scheelite, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA
Green Monster Mine, Kearsarge, Kearsarge Mining District [2], Inyo Mts (Inyo Range), Inyo County, California, USA
Birch Creek, White Mountains, Inyo County, California, USA

ⓘ 'Clinochrysotile'

ⓘ Clinoferrosilite

Formula: Fe2+2Si2O6

Localities:

Coso Hot Springs deposit, Coso Hot Springs, Inyo County, California, USA
Unspecified Clinoferrosilite occurrence [1], Inyo County, California, USA
Unnamed lava flow [1], Sugarloaf Mountain, Inyo County, California, USA

ⓘ 'Clinoptilolite Subgroup'

Formula: M3-6(Si30Al6)O72 · 20H2O

Localities: Reported from at least 11 localities in this region.

ⓘ 'Clinopyroxene Subgroup'

ⓘ Clinozoisite

Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)

Localities:

Darwin Mining District, Darwin Hills, Inyo County, California, USA
Birch Creek, White Mountains, Inyo County, California, USA
Tecopa paleolake deposits, Tecopa, Sperry Hills, Inyo County, California, USA

Description: Occurs as a common alteration product of igneous intrusives.

ⓘ Clinozoisite var. Clinothulite

Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)

ⓘ Cobaltite

Formula: CoAsS

Localities:

Copconis prospect, Chocolate Peak, Inyo County, California, USA
Bishop Mine, Chocolate Peak, Inyo County, California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Colemanite (TL)

Formula: Ca[B3O4(OH)3] · H2O

Localities: Reported from at least 61 localities in this region.

ⓘ Conichalcite

Formula: CaCu(AsO4)(OH)

Localities:

Darwin Mining District, Darwin Hills, Inyo County, California, USA
Reward Mine, Reward, Russ Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Zinc Hill Mine (Utacaia group; Colorado group; Darwin Zinc prospect), Zinc Hill, Zinc Hill Mining District, Argus Mts (Argus Range), Inyo County, California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Connellite

Formula: Cu19(SO4)(OH)32Cl4 · 3H2O

ⓘ Copiapite

Formula: Fe2+Fe3+4(SO4)6(OH)2 · 20H2O

Localities:

Coso Mine (Devil's Kitchen; Atlas; Lynch & Lynch; Nicol; Walley-Mickey & Wheeler), Coso Hot Springs deposit, Coso Hot Springs, Inyo County, California, USA
Coso Hot Springs deposit, Coso Hot Springs, Inyo County, California, USA
Unnamed Mo occurrence [2], Inyo County, California, USA

ⓘ Copper

Formula: Cu

Localities: Reported from at least 7 localities in this region.

ⓘ 'Copper Stain'

Localities:

Hayward Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
San Felipe Mine (San Filipe claim), Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Silver Reef Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Coquimbite

Formula: AlFe3(SO4)6(H2O)12 · 6H2O

Localities:

Coso Mine (Devil's Kitchen; Atlas; Lynch & Lynch; Nicol; Walley-Mickey & Wheeler), Coso Hot Springs deposit, Coso Hot Springs, Inyo County, California, USA
Unnamed W-Bi deposit [1], Darwin area, Inyo County, California, USA
Coso Hot Springs deposit, Coso Hot Springs, Inyo County, California, USA

ⓘ Corkite

Formula: PbFe3(PO4)(SO4)(OH)6

ⓘ Coronadite

Formula: Pb(Mn4+6Mn3+2)O16

Localities: Reported from at least 6 localities in this region.

ⓘ Cosalite

Formula: Pb2Bi2S5

ⓘ Covellite

Formula: CuS

Localities: Reported from at least 10 localities in this region.

ⓘ Creedite

Formula: Ca3Al2(SO4)(OH)2F8 · 2H2O

Localities:

Darwin Mining District, Darwin Hills, Inyo County, 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 Mining District, Darwin Hills, Inyo County, 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 Mining District, Darwin Hills, Inyo County, California, USA
Anaconda Mine, Panamint (old Panamint), Panamint Mining District (Ballarat Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA
Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Cristobalite

Formula: SiO2

Localities: Reported from at least 7 localities in this region.

Description: Occurs in spherulites in obsidian.

ⓘ Crocoite

Formula: PbCr6+O4

Localities:

Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Cryptomelane

Formula: K(Mn4+7Mn3+)O16

Localities:

Minnietta Mine (Minnietta Mines; Minietta Mine; Minneatta; St. John), Lookout City, Lookout Mining District (Modoc Mining District), Argus Mts (Argus Range), Inyo County, California, USA
Modoc Mine (Modock Mine), Lookout City, Lookout Mining District (Modoc Mining District), Argus Mts (Argus Range), Inyo County, California, USA
Defense Mine, Lookout City, Lookout Mining District (Modoc Mining District), Argus Mts (Argus Range), Inyo County, California, USA
Unnamed Mn-W occurrence [1], Saline Valley, Inyo County, California, USA

ⓘ Cuprite

Formula: Cu2O

Localities: Reported from at least 11 localities in this region.

ⓘ Cupropavonite

Formula: Cu0.9Ag0.5Pb0.6Bi2.5S5

ⓘ Cuprotungstite

Formula: Cu2(WO4)(OH)2

Colour: light olive-green to greenish yellow

Description: Occurs as a replacement of scheelite in fractures in the scheelite.

ⓘ Darapskite

Formula: Na3(SO4)(NO3) · H2O

ⓘ Datolite

Formula: CaB(SiO4)(OH)

Localities:

San Carlos Mine (Old San Carlos Mine), Kearsarge, Kearsarge Mining District [2], Inyo Mts (Inyo Range), Inyo County, California, USA
Corkscrew Canyon Mine, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Unnamed Nobleite locality [1], Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Unnamed Borate occurrences [25], Corkscrew Canyon, Black Mountains, Amargosa Range, Inyo County, California, USA
Unnamed Borate prospect hole [24], Mouth of Corkscrew Canyon area, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA

Colour: White

Description: Massive.

ⓘ Datolite var. Bakerite (FRL)

Formula: Ca4(H5B5Si3O20)

Localities:

Corkscrew Canyon Mine, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Unnamed Nobleite locality [1], Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Unnamed Borate occurrences [25], Corkscrew Canyon, Black Mountains, Amargosa Range, Inyo County, California, USA
Unnamed Borate prospect hole [24], Mouth of Corkscrew Canyon area, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA

ⓘ Dawsonite

Formula: NaAlCO3(OH)2

Description: Occurs as asoft earthy incrustation in a dike.

ⓘ Descloizite

Formula: PbZn(VO4)(OH)

Localities:

April Fool claims (April Fool claim; Keegan; Manganese No. 1 and No. 4 claims), Owlshead Mountains, Inyo County, California, USA
Reward Mine, Reward, Russ Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Devilline

Formula: CaCu4(SO4)2(OH)6 · 3H2O

References:

ⓘ 'Deweylite'

Formula: Mg4Si3O10 · 6H2O ?

ⓘ Diopside

Formula: CaMgSi2O6

Localities: Reported from at least 19 localities in this region.

ⓘ Dioptase

Formula: CuSiO3 · H2O

ⓘ Dolomite

Formula: CaMg(CO3)2

Localities: Reported from at least 17 localities in this region.

ⓘ Dufrénoysite

Formula: Pb2As2S5

ⓘ Duftite

Formula: PbCu(AsO4)(OH)

Localities:

Shirley Ann group, Big Dodd Spring, Ubehebe Mining District, Cottonwood Mountains, Panamint Mts (Panamint Range), Inyo County, California, USA
Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Reward Mine, Reward, Russ Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Belmont Mine, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Dugganite

Formula: Pb3Zn3(AsO4)2(TeO6)

ⓘ Dzhalindite

Formula: In(OH)3

ⓘ Ecandrewsite

Formula: (Zn,Fe2+,Mn2+)TiO3

References:

ⓘ Ecdemite

Formula: Pb6As3+2O7Cl4

Description: Occurs as an alteration product of mimetite.

ⓘ Enargite

Formula: Cu3AsS4

Localities:

ⓘ Epidote

Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)

Localities: Reported from at least 39 localities in this region.

ⓘ Epsomite

Formula: MgSO4 · 7H2O

ⓘ 'Erionite Subgroup'

Formula: M2[Al4Si14O36] · 15H2O

Localities:

Ash Meadows Zeolite deposit, Shoshone, Dublin Hills, Inyo County, California, USA
Lake Tecopa Zeolite deposit, Lake Tecopa Basin, Inyo County, California, USA
Owens Lake, Olancha, Owens Valley, Inyo County, California, USA

ⓘ Erythrite

Formula: Co3(AsO4)2 · 8H2O

References:

Palache, Charles, Berman, Harry, Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Ect. John Wiley and Sons, New York.

ⓘ Eskimoite

Formula: Ag7Pb10Bi15S36

Localities:

St. Charles Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Jackass Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Eugsterite

Formula: Na4Ca(SO4)3 · 2H2O

ⓘ Famatinite

Formula: Cu3SbS4

Localities:

Description: Occurs as micro-grains (detected in polished sections).

ⓘ Fayalite

Formula: Fe2+2SiO4

Localities:

Obsidian Ridge, Inyo County, California, USA
Unnamed lava flow [1], Sugarloaf Mountain, Inyo County, California, USA
Little Lake Perlite deposits (Desert Materials Corp. deposit), Sugarloaf Mountain, Inyo County, California, USA
Little Lake, Rose Valley, Inyo County, California, USA

ⓘ 'Fayalite-Forsterite Series'

Description: Occurs as phenocrysts to 13 mm long in basalt covering large parts of the Ubehebe quadrangle.

ⓘ 'Feldspar Group'

Localities:

Nine Mile Canyon Mine (Nine Mile Feldspar), Boulder Peak, Inyo County, California, USA
Little Chief Granite Dome, Panamint (old Panamint), Panamint Mining District (Ballarat Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA

ⓘ 'Feldspar Group var. Perthite'

Description: Replacement of sanidine by sodic oligoclase.

ⓘ Ferberite

Formula: FeWO4

Localities:

Yaney Mine, Bishop, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA
Aeroplane Mine (Mesa Mine; Standard Tungsten City Milling Co. Mine; Moonlight Mine), Tungsten Hills, West Bishop, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA
Monarch Mine (Navajo Chief Mine; Tres Arrastre Mine), Little Dodd Spring, Ubehebe Mining District, Cottonwood Mountains, Panamint Mts (Panamint Range), Inyo County, California, USA ? (more information)

ⓘ Ferberite var. Reinite

Formula: FeWO4

ⓘ Ferricopiapite

Formula: Fe3+0.67Fe3+4(SO4)6(OH)2 · 20H2O

ⓘ Ferrimolybdite

Formula: Fe2(MoO4)3 · nH2O

Colour: Bright yellow

Description: Occurs replacing molybdenite in higher Mo-enriched areas.

ⓘ Ferrisurite (TL)

Formula: (Pb,Ca)2.4Fe3+2(Si4O10)(CO3)1.7(OH)3 · nH2O

Type Locality:

ⓘ Ferro-actinolite

Formula: ◻Ca2Fe2+5(Si8O22)(OH)2

ⓘ Fibroferrite

Formula: Fe3+(SO4)(OH) · 5H2O

ⓘ Fluorapatite

Formula: Ca5(PO4)3F

Description: Plumbian

ⓘ Fluorite

Formula: CaF2

Localities: Reported from at least 39 localities in this region.

ⓘ 'Fluor-uvite-Uvite Series'

ⓘ Fornacite

Formula: Pb2Cu(CrO4)(AsO4)(OH)

Localities:

Shirley Ann group, Big Dodd Spring, Ubehebe Mining District, Cottonwood Mountains, Panamint Mts (Panamint Range), Inyo County, California, USA
Reward Mine, Reward, Russ Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, California, USA
Defense Mine, Lookout City, Lookout Mining District (Modoc Mining District), Argus Mts (Argus Range), Inyo County, California, USA

ⓘ Fraipontite

Formula: (Zn,Al)3((Si,Al)2O5)(OH)4

ⓘ Franckeite

Formula: Fe2+(Pb,Sn2+)6Sn4+2Sb2S14

Localities:

Darwin Mines (Darwin group; Defiance; Driver; Independence; Lane; Liberty; Lucky Jim; Southwest and Thompson; Bernon; Rip Van Winkle; Mexicanus Colorado Inc.), Darwin, Darwin Mining District, Darwin Hills, Inyo County, 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 Mining District, Darwin Hills, Inyo County, California, USA

ⓘ 'Freibergite Subgroup'

Formula: (Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1

ⓘ 'Freibergite-Tetrahedrite Series'

Description: Occurs in substantial amounts.

ⓘ Friedrichite

Formula: Pb5Cu5Bi7S18

References:

Dunning, G.E., Moëlo, Y., Roberts, A.C. and Cooper Jr, J.F., 2002. Ag-Cu-Pb-Bi Sulfosalts New to Darwin, Inyo County, California. Between the Basins: Exploring the Western Mojave and, p.69.

ⓘ Galena

Formula: PbS

Localities: Reported from at least 124 localities in this region.

ⓘ Galena var. Silver-bearing Galena

Formula: PbS with Ag

Localities: Reported from at least 12 localities in this region.

ⓘ Galenobismutite

Formula: PbBi2S4

Localities:

Lucky Lucy Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
St. Charles Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ 'Garnet Group'

Formula: X3Z2(SiO4)3

Localities: Reported from at least 32 localities in this region.

ⓘ Gaylussite

Formula: Na2Ca(CO3)2 · 5H2O

Description: Occurs in lake bed deposits.

ⓘ Geffroyite

Formula: (Cu,Fe,Ag)9(Se,S)8

ⓘ Gehlenite

Formula: Ca2Al[AlSiO7]

Localities:

Paraspurrite type locality, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Unnamed Gehlenite occurrence [1], Lost Burro Spring, Ubehebe Mining District, Cottonwood Mountains, Panamint Mts (Panamint Range), Inyo County, California, USA

ⓘ Geocronite

Formula: Pb14Sb6S23

Localities:

Eclipse Mine, Mazourka Canyon, Tibbetts Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Santa Maria Mine (Santa Maria claim), Cerro Gordo Mine, Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Gersdorffite

Formula: NiAsS

ⓘ Ginorite

Formula: Ca2B14O20(OH)6 · 5H2O

Localities:

Hard Scramble claim, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
South Meridian claim, Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Mott prospect (Mott Colemanite prospect; Mott open cut), Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
East Coleman Mine, Furnace Creek, Inyo County, California, USA

Description: Occurs as an alteration product of colemanite and priceite veins in surficial material.

ⓘ Glauberite

Formula: Na2Ca(SO4)2

Localities:

Saline Valley, Inyo County, California, USA
Pluto Springs, Inyo County, California, USA
Deep Springs Lake (Deep Springs Playa), Deep Springs Valley, Inyo County, California, USA
Amargosa Valley, Inyo County, California, USA

Description: Occurs in the playa.

ⓘ Goethite

Formula: α-Fe3+O(OH)

Localities: Reported from at least 8 localities in this region.

ⓘ Gold

Formula: Au

Localities: Reported from at least 170 localities in this region.

Habit: Octahedral

Colour: Golden

Description: Microscopic octahedral crystals.

ⓘ Gold var. Electrum

Formula: (Au,Ag)

Localities:

Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Kearsarge Mining District [2], Inyo Mts (Inyo Range), Inyo County, California, USA
Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Goslarite

Formula: ZnSO4 · 7H2O

Localities:

Darwin Mining District, Darwin Hills, Inyo County, California, USA
Jackass Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, California, USA

Description: A supergene component of oxidized Ag-Pb ores.

ⓘ Gowerite (TL)

Formula: Ca[B5O8(OH)][B(OH)3] · 3H2O

Localities: Reported from at least 9 localities in this region.

ⓘ Graphite

Formula: C

Localities:

Black Lady Nos. 1 and 2 Mine, Johnson Spring, Tibbetts Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Badwater Turtleback core complex, Black Mountains, Amargosa Range, Inyo County, California, USA

ⓘ Greenockite

Formula: CdS

Localities:

Cerro Gordo Mine, Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA ? (more information)

ⓘ Grossular

Formula: Ca3Al2(SiO4)3

Localities: Reported from at least 15 localities in this region.

ⓘ Guanajuatite

Formula: Bi2Se3

Localities:

Darwin Mining District, Darwin Hills, Inyo County, 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 Mining District, Darwin Hills, Inyo County, 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 Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Gustavite

Formula: AgPbBi3S6

Localities:

Darwin Mining District, Darwin Hills, Inyo County, California, USA
St. Charles Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Lucky Lucy Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Gypsum

Formula: CaSO4 · 2H2O

Localities: Reported from at least 38 localities in this region.

ⓘ Gypsum var. Selenite

Formula: CaSO4 · 2H2O

Localities:

Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Upper Canyon Nitrate deposit (Upper Canyon Niter beds; Nitre Beds; Upper Canyon beds), China Ranch (Morrison Ranch), Inyo County, California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, California, USA

Habit: Acicular and prismatic.

Description: Fine acicular and prismatic crystals common.

ⓘ Haiweeite (TL)

Formula: Ca(UO2)2[Si5O12(OH)2] · 6H2O

Type Locality:

Description: Occurs as spherulitic aggregates on fracture surfaces in granite.

References:

Outerbridge, W. F., Staatz, M. H., Meyrowitz, R., Pommer, A. M. (1960) Weeksite, a new uranium silicate from the Thomas Range, Juab County, Utah. American Mineralogist, 45 (1-2) 39-52

ⓘ Halite

Formula: NaCl

Localities: Reported from at least 11 localities in this region.

ⓘ Halloysite

Formula: Al2(Si2O5)(OH)4

Localities:

Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Cerro Gordo Mine, Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Halotrichite

Formula: FeAl2(SO4)4 · 22H2O

Localities:

Pacific Coast Pyrophyllite Mine, White Mountains, Inyo County, California, USA
Coso Mine (Devil's Kitchen; Atlas; Lynch & Lynch; Nicol; Walley-Mickey & Wheeler), Coso Hot Springs deposit, Coso Hot Springs, Inyo County, California, USA
Coso Hot Springs deposit, Coso Hot Springs, Inyo County, California, USA

ⓘ Hastingsite

Formula: NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2

Description: Occurs as a constituent of the amphibole tactite.

ⓘ Hectorite

Formula: Na0.3(Mg,Li)3(Si4O10)(F,OH)2

ⓘ Hedenbergite

Formula: CaFe2+Si2O6

Colour: Black to grayish green

Description: Occurs as 55% to 95% pure material in a tactite zone. Stubby to elongate prisms and anhedral grains.

ⓘ Hedyphane

Formula: Ca2Pb3(AsO4)3Cl

Description: Micro material, pale almost colorless crystals with larger crystals of mimetite.

ⓘ Hematite

Formula: Fe2O3

Localities: Reported from at least 31 localities in this region.

ⓘ Hematite var. Specularite

Formula: Fe2O3

Localities: Reported from at least 7 localities in this region.

ⓘ Hemimorphite

Formula: Zn4Si2O7(OH)2 · H2O

Localities: Reported from at least 23 localities in this region.

ⓘ Herbertsmithite

Formula: Cu3Zn(OH)6Cl2

Habit: euhedral

Colour: dark green

ⓘ Hessite

Formula: Ag2Te

ⓘ Hetaerolite

Formula: ZnMn2O4

References:

ⓘ 'Heulandite Subgroup'

Formula: (Na/Ca/K)5-6[Al8-9 Si27-28 O72] · nH2O

Localities:

Terry Mine (Terry Borate Mine; Terry pit; Terry deposit), Amargosa Valley, Inyo County, California, USA
Green Eye claim, Summit 2347 meters, Nelson Range, Lee Mining District, Inyo County, California, USA
Unnamed Zeolite occurrence [3], Summit 2347 meters, Nelson Range, Lee Mining District, Inyo County, California, USA

ⓘ Hexahydrite

Formula: MgSO4 · 6H2O

ⓘ Heyrovskýite

Formula: Pb6Bi2S9

Localities:

Lucky Lucy Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
St. Charles Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Jackass Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ 'Hornblende Root Name Group'

Formula: ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2

Localities:

Little Chief Granite Dome, Panamint (old Panamint), Panamint Mining District (Ballarat Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA
Buckshot Mine (Shannon Creek Mine), Keough Hot Springs, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA
Round Valley Mine (Nobles Camp; Big Shoot Noble; Brooks Mine; Silver Bell; Silver Ball; Western Tungsten; Big Shot; Haco; Tungsten Hill Mine DMEA-2256), West Bishop, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA
Unnamed Hornblende occurrence [2], Little Dodd Spring, Ubehebe Mining District, Cottonwood Mountains, Panamint Mts (Panamint Range), Inyo County, California, USA
Unnamed Hornblende occurrence [1], Big Dodd Spring, Ubehebe Mining District, Cottonwood Mountains, Panamint Mts (Panamint Range), Inyo County, California, USA

ⓘ Howlite

Formula: Ca2B5SiO9(OH)5

Localities:

Billie Mine, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Gower Gulch Mine, Zabriskie Point, Black Mountains, Amargosa Range, Inyo County, California, USA

ⓘ Hübnerite

Formula: MnWO4

ⓘ Humite

Formula: Mg7(SiO4)3F2

ⓘ Hungchaoite

Formula: Mg(B4O7) · 9H2O

Localities:

Hard Scramble claim, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Meridian claim, Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
South Meridian claim, Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Unnamed Borate occurrence [28], Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA

ⓘ Hydroboracite

Formula: CaMg[B3O4(OH)3]2 · 3H2O

Localities: Reported from at least 9 localities in this region.

ⓘ Hydrohalloysite

Formula: Al2Si2O5(OH)4 · 2H2O

ⓘ Hydromagnesite

Formula: Mg5(CO3)4(OH)2 · 4H2O

Description: Occurs as chalky or mealy crusts.

ⓘ Hydrozincite

Formula: Zn5(CO3)2(OH)6

Localities: Reported from at least 19 localities in this region.

ⓘ 'Iddingsite'

Formula: MgO · Fe2O3 · 3SiO2 · 4H2O

Localities:

Monte Blanco, Black Mountains, Amargosa Range, Inyo County, California, USA
Ubehebe Mining District, Cottonwood Mountains, Panamint Mts (Panamint Range), Inyo County, California, USA

Description: Occurs in basalts about 1 mile SE from the Russell Borax Mine.

ⓘ Ilmenite

Formula: Fe2+TiO3

Localities:

Little Chief Granite Dome, Panamint (old Panamint), Panamint Mining District (Ballarat Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA
Birch Creek, White Mountains, Inyo County, California, USA
Badwater Turtleback core complex, Black Mountains, Amargosa Range, Inyo County, California, USA

ⓘ Ilsemannite

Formula: Mo3O8 · nH2O

Description: Occurs as a pigment on copiapite in the vicinity of the molybdenite deposit.

References:

ⓘ Inderite

Formula: MgB3O3(OH)5 · 5H2O

Description: Produced by weathering of near-surface colemanite and priceite veins.

ⓘ Inyoite (TL)

Formula: Ca(H4B3O7)(OH) · 4H2O

Localities:

Monte Blanco Mine, Monte Blanco, Black Mountains, Amargosa Range, Inyo County, California, USA
Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Corkscrew Canyon Mine, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Oliver claim (Neglect claim; Oliver Consolidated claim), Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA

Habit: Tabular

Colour: White

Description: Occurs as tabular crystals altering to meyerhofferite.

ⓘ Iron

Formula: Fe

ⓘ Iron var. Kamacite

Formula: (Fe,Ni)

ⓘ Jamesonite

Formula: Pb4FeSb6S14

Localities:

Cerro Gordo Mine, Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Jarosite

Formula: KFe3+3(SO4)2(OH)6

Localities: Reported from at least 15 localities in this region.

ⓘ 'Jasper'

Localities: Reported from at least 24 localities in this region.

ⓘ Junoite

Formula: Cu2Pb3Bi8(S,Se)16

Localities:

Lucky Lucy Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Silver Spoon Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
St. Charles Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Kaliborite

Formula: KMg2H[B6O8(OH)5]2(H2O)4

ⓘ Kalinite

Formula: KAl(SO4)2 · 11H2O

Colour: White

Description: Occurs as crusts on the sides of steaming vents.

ⓘ Kaolinite

Formula: Al2(Si2O5)(OH)4

Localities: Reported from at least 6 localities in this region.

ⓘ Kasolite

Formula: Pb(UO2)(SiO4) · H2O

ⓘ Kettnerite

Formula: CaBiCO3OF

Localities:

Reward Mine, Reward, Russ Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Fernando Mine (St. Charles; Hayward; Darwin Silver project; Fernando and St Charles), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ 'K Feldspar'

Localities: Reported from at least 6 localities in this region.

Description: Occurs as authigenic material formed by a reaction of zeolites with interstitial waters.

ⓘ 'K Feldspar var. Adularia'

Formula: KAlSi3O8

ⓘ Kobyashevite

Formula: Cu5(SO4)2(OH)6 · 4H2O

References:

ⓘ Konyaite

Formula: Na2Mg(SO4)2 · 5H2O

ⓘ Kornelite

Formula: Fe2(SO4)3 · 7H2O

Localities:

Coso Mine (Devil's Kitchen; Atlas; Lynch & Lynch; Nicol; Walley-Mickey & Wheeler), Coso Hot Springs deposit, Coso Hot Springs, Inyo County, California, USA
Coso Hot Springs, Inyo County, California, USA
Coso Hot Springs deposit, Coso Hot Springs, Inyo County, California, USA

ⓘ Krupkaite

Formula: PbCuBi3S6

References:

Dunning, G.E., Moëlo, Y., Roberts, A.C. and Cooper Jr, J.F., 2002. Ag-Cu-Pb-Bi Sulfosalts New to Darwin, Inyo County, California. Between the Basins: Exploring the Western Mojave and, p.69.

ⓘ Krut'aite

Formula: CuSe2

ⓘ Ktenasite

Formula: ZnCu4(SO4)2(OH)6 · 6H2O

References:

ⓘ Kurnakovite

Formula: MgB3O3(OH)5 · 5H2O

Description: Occurs with other fine-grained borates. Produced by weathering of near-surface colemanite and priceite veins.

ⓘ Kyanite

Formula: Al2(SiO4)O

Localities:

Unnamed Kyanite occurrence [1], Pyramid Peak, Funeral Mts (Funeral Range), Amargosa Range, Inyo County, California, USA
Badwater Turtleback core complex, Black Mountains, Amargosa Range, Inyo County, California, USA

ⓘ Lahnsteinite

Formula: Zn4(SO4)(OH)6 · 3H2O

References:

ⓘ Larnite

Formula: Ca2SiO4

ⓘ Laumontite

Formula: CaAl2Si4O12 · 4H2O

Localities:

No. 4 Glory Hole, Pine Creek Mine (Black Monster Mine; Snow Queen Mine; Pine Creek Tungsten Mine & mill; Pine Creek apt plant; Pine Creek custom mill), Scheelite, Bishop Mining District (Tungsten Hills Mining District), Inyo County, 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 Mining District (Tungsten Hills Mining District), Inyo County, California, USA

Habit: Prismatic

Colour: White, buff

Description: Occurs as a large crumbly mass of interlocking prisms in the contact zone of the scheelite ores; later, spectacular white to buff crystals greater than 1 foot (0.3 meters) long were found!

ⓘ Lazulite

Formula: MgAl2(PO4)2(OH)2

Description: Occurs in a vein in schist.

ⓘ Leadhillite

Formula: Pb4(CO3)2(SO4)(OH)2

Localities: Reported from at least 7 localities in this region.

Colour: Pale sea-green tint

Description: Small, imperfect crystals.

ⓘ Lepidocrocite

Formula: γ-Fe3+O(OH)

References:

ⓘ Leucite

Formula: K(AlSi2O6)

ⓘ 'Limonite'

Localities: Reported from at least 43 localities in this region.

ⓘ Linarite

Formula: PbCu(SO4)(OH)2

Localities: Reported from at least 27 localities in this region.

ⓘ Liroconite

Formula: Cu2Al(AsO4)(OH)4 · 4H2O

Localities:

ⓘ Litharge

Formula: PbO

ⓘ Löllingite

Formula: FeAs2

Localities:

Bishop Creek Mine (Wilshire Bishop Creek Mine; Wilshire Gold Mine; Cardinal Mine; Cardinal Gold Mining Company claims; Cardinal Gold property; Rocky Point group; Wiltshire), Aspendell, Bishop Creek Mining District, Inyo County, California, USA
Ruth Mine, Reward, Russ Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA

Description: A little occurs here.

ⓘ Luzonite

Formula: Cu3AsS4

ⓘ Magadiite

Formula: Na2Si14O29 · 11H2O

Description: Saturates this spring. Deposits not examined.

ⓘ Magnesite

Formula: MgCO3

ⓘ Magnetite

Formula: Fe2+Fe3+2O4

Localities: Reported from at least 11 localities in this region.

ⓘ Malachite

Formula: Cu2(CO3)(OH)2

Localities: Reported from at least 53 localities in this region.

ⓘ 'Manganese Oxides'

Localities:

Black Dream occurrence (Wingate Wash occurrence), Owlshead Mountains, Inyo County, California, USA
Defense Mine, Lookout City, Lookout Mining District (Modoc Mining District), Argus Mts (Argus Range), Inyo County, California, USA
Wingate Wash Mine (Black Dream deposit), Shore Line Butte, Inyo County, California, USA
Summit lode, Mountain Spring, Argus Mining District (Kellcy Mining District; Sherman Mining District), Argus Mts (Argus Range), Inyo County, California, USA
Reward Mine, Reward, Russ Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ 'Manganese Oxides var. Manganese Dendrites'

Localities:

Summit lode, Mountain Spring, Argus Mining District (Kellcy Mining District; Sherman Mining District), Argus Mts (Argus Range), Inyo County, California, USA
Reward Mine, Reward, Russ Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Marcasite

Formula: FeS2

Description: Occurs as micro-inclusions in massive pyrrhotite.

ⓘ Marialite

Formula: Na4Al3Si9O24Cl

Localities:

Unnamed Marialite occurrence [1], Cerussite Mine area, Summit 2347 meters, Nelson Range, Lee Mining District, Inyo County, California, USA
Unspecified Marialite occurrence [2], Big Dodd Spring, Ubehebe Mining District, Cottonwood Mountains, Panamint Mts (Panamint Range), Inyo County, California, USA
Shamrock claim, Big Dodd Spring, Ubehebe Mining District, Cottonwood Mountains, Panamint Mts (Panamint Range), Inyo County, California, USA

Description: near Me20 to near Me50.

ⓘ Massicot

Formula: PbO

Localities:

Unspecified Pb occurrence [3], Andrews Mountain, Inyo Mts (Inyo Range), Inyo County, California, USA
Darwin Mining District, Darwin Hills, Inyo County, California, USA
Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Matildite

Formula: AgBiS2

Localities:

Darwin Mining District, Darwin Hills, Inyo County, 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 Mining District, Darwin Hills, Inyo County, California, USA
Jackass Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Mcallisterite (TL)

Formula: Mg2[B6O7(OH)6]2 · 9H2O

Localities:

Mott prospect (Mott Colemanite prospect; Mott open cut), Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Hard Scramble claim, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Meridian claim, Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
South Meridian claim, Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Eagle Borax Spring, Inyo County, 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.

ⓘ Melanotekite

Formula: Pb2Fe3+2(Si2O7)O2

ⓘ Melanterite

Formula: Fe2+(H2O)6SO4 · H2O

Description: A component of Ag-Pb ores in the oxidized zone.

ⓘ Metacinnabar

Formula: HgS

Localities: Reported from at least 7 localities in this region.

ⓘ Metahaiweeite (TL)

Formula: Ca(UO2)2Si6O15 · nH2O

Type Locality:

ⓘ Metastibnite

Formula: Sb2S3

ⓘ Metatorbernite

Formula: Cu(UO2)2(PO4)2 · 8H2O

Description: Unspecified location.

ⓘ Meyerhofferite (TL)

Formula: CaB3O3(OH)5 · H2O

Localities: Reported from at least 6 localities in this region.

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.

ⓘ 'Mica Group'

Localities:

Lakeview Quarries (Lakeview Talc Mine; Lakeview deposit), Haystack Mountain (Haystack; Boulder Mountain; Kern Knob), Inyo Mts (Inyo Range), Inyo County, California, USA
Unnamed Mica occurrence [1], Surprise Canyon, Ballarat, Panamint Mining District (Ballarat Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA

ⓘ Microcline

Formula: K(AlSi3O8)

Localities:

Unnamed Amazonite occurrence [1], Haystack Mountain (Haystack; Boulder Mountain; Kern Knob), Inyo Mts (Inyo Range), Inyo County, California, USA
Unnamed Microcline occurrence [1], Lone Pine, Alabama Hills, Inyo County, California, USA

ⓘ Microcline var. Amazonite

Formula: K(AlSi3O8)

Description: Occurs as poorly developed crystals in pegmatite.

ⓘ Mimetite

Formula: Pb5(AsO4)3Cl

Localities: Reported from at least 15 localities in this region.

ⓘ Minium

Formula: Pb3O4

Localities:

Darwin Mining District, Darwin Hills, Inyo County, California, USA
Cerro Gordo Mine, Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Queen of Sheba Mine, Warm Spring, Carbonate Mining District, Panamint Mts (Panamint Range), Inyo County, California, USA

Description: Fairly common.

ⓘ Mirabilite

Formula: Na2SO4 · 10H2O

Localities:

Deep Springs Lake (Deep Springs Playa), Deep Springs Valley, Inyo County, California, USA
Hard Scramble claim, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Owens Lake, Olancha, Owens Valley, Inyo County, California, USA
Saline Valley, Inyo County, California, USA

ⓘ Mixite

Formula: BiCu6(AsO4)3(OH)6 · 3H2O

Localities:

Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Ella Mine (Ella group), Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Unnamed Cu prospect [4], Cerro Gordo Peak, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Cerro Gordo Mine, Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Molybdenite

Formula: MoS2

Localities: Reported from at least 15 localities in this region.

Description: Occurs as large masses.

ⓘ 'Molybdenite-2H'

Formula: MoS2

ⓘ 'Monazite Group'

Formula: REE(PO4)

References:

ⓘ Monazite-(La)

Formula: La(PO4)

ⓘ Montmorillonite

Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O

Localities: Reported from at least 8 localities in this region.

ⓘ 'Moonstone'

Description: Occurs as small crystals in rhyolite.

ⓘ Mottramite

Formula: PbCu(VO4)(OH)

ⓘ Munakataite

Formula: Pb2Cu2(Se4+O3)(SO4)(OH)4

Localities:

Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, California, USA
Reward Mine, Reward, Russ Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Muscovite

Formula: KAl2(AlSi3O10)(OH)2

Localities: Reported from at least 15 localities in this region.

ⓘ Muscovite var. Illite

Formula: K0.65Al2.0[Al0.65Si3.35O10](OH)2

Localities:

Deep Springs Playa Clay deposits, Deep Springs Lake (Deep Springs Playa), Deep Springs Valley, Inyo County, California, USA
Lake Tecopa Zeolite deposit, Lake Tecopa Basin, Inyo County, California, USA
Franklin Lake playa, Amargosa Desert, Inyo County, California, USA

Description: Principal clay mineral.

ⓘ Muscovite var. Sericite

Formula: KAl2(AlSi3O10)(OH)2

Localities:

Darwin Mining District, Darwin Hills, Inyo County, California, USA
X-Ray Mine (Little Gem), Black Canyon Spring, White Mountains, Inyo County, 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 Mining District, Darwin Hills, Inyo County, California, USA
Keynot Mine (Key Not Mine; Golden Princess; Mountain View; War Eagle; Keynot; Keynote Mine; Mallard Duck), Keynot Peak, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Nahcolite

Formula: NaHCO3

Description: Occurs in muds.

ⓘ Natrite

Formula: Na2CO3

ⓘ Natroalunite

Formula: NaAl3(SO4)2(OH)6

References:

ⓘ Natrolite

Formula: Na2Al2Si3O10 · 2H2O

Description: Occurs in radiating groups in amygdules of basalt.

ⓘ Natron

Formula: Na2CO3 · 10H2O

Description: Occurs dissolved in lake waters.

References:

ⓘ Naumannite

Formula: Ag2Se

ⓘ Nepheline

Formula: Na3K(Al4Si4O16)

Description: Coarse-grained, fresh, in nepheline-syenite.

ⓘ Neyite

Formula: Ag2Cu6Pb25Bi26S68

ⓘ Niter

Formula: KNO3

Localities:

Badwater Basin, Inyo County, California, USA
Old lake shorelines, Inyo County, California, USA
Unnamed Nitrate-Borate deposits, Shoshone, Dublin Hills, Inyo County, California, USA
Upper Canyon Nitrate deposit (Upper Canyon Niter beds; Nitre Beds; Upper Canyon beds), China Ranch (Morrison Ranch), Inyo County, California, USA

Description: Occurs along the river as crusts.

ⓘ Nitratine

Formula: NaNO3

Localities: Reported from at least 10 localities in this region.

ⓘ Nobleite (TL)

Formula: CaB6O9(OH)2 · 3H2O

Localities: Reported from at least 8 localities in this region.

ⓘ Nontronite ?

Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O

ⓘ Olivenite

Formula: Cu2(AsO4)(OH)

Localities:

Zinc Hill Mine (Utacaia group; Colorado group; Darwin Zinc prospect), Zinc Hill, Zinc Hill Mining District, Argus Mts (Argus Range), Inyo County, California, USA
Ibex Mine (Ibex Mine Arcturus; Arcturus Mine), Black Mountains, Amargosa Range, Inyo County, California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Olsacherite

Formula: Pb2(Se6+O4)(SO4)

ⓘ Opal

Formula: SiO2 · nH2O

Localities: Reported from at least 12 localities in this region.

ⓘ Opal var. Opal-AN

Formula: SiO2 · nH2O

Localities:

Custer Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Coso Mine (Devil's Kitchen; Atlas; Lynch & Lynch; Nicol; Walley-Mickey & Wheeler), Coso Hot Springs deposit, Coso Hot Springs, Inyo County, California, USA
Pickup Mine (Chipmunk Mine), Lookout Mountain, Inyo County, California, USA

Fluorescence: Green (brilliant)

Description: Occurs coating a calcite seam.

ⓘ Orthoclase

Formula: K(AlSi3O8)

Localities: Reported from at least 10 localities in this region.

ⓘ 'Orthopyroxene Subgroup'

References:

ⓘ Orthoserpierite

Formula: Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O

ⓘ Osakaite

Formula: Zn4(SO4)(OH)6 · 5H2O

References:

ⓘ Ottrélite

Formula: Mn2+Al2O(SiO4)(OH)2

Habit: Oblong plates

Colour: Dark green

Description: Occurs in schists. Constitutes considerable proportion of the schists in localized areas.

ⓘ Parabutlerite

Formula: Fe3+(SO4)(OH) · 2H2O

ⓘ Paratacamite

Formula: Cu3(Cu,Zn)(OH)6Cl2

ⓘ Parauranophane

Formula: Ca(UO2)2(SiO3OH)2 · 5H2O

Description: Unspecified location.

ⓘ Pauladamsite (TL)

Formula: Cu4(SeO3)(SO4)(OH)4 · 2H2O

Type Locality:

References:

ⓘ Pavonite

Formula: AgBi3S5

Localities:

Lucky Lucy Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
St. Charles Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Pectolite

Formula: NaCa2Si3O8(OH)

Description: Occurs as an alteration product of wollastonite.

ⓘ Perite

Formula: PbBiClO2

ⓘ 'Phillipsite Subgroup'

Localities: Reported from at least 7 localities in this region.

ⓘ Phlogopite

Formula: KMg3(AlSi3O10)(OH)2

Localities:

Tungstar Mine (Crawford; Tungstar Mine-Greeve orebody; Greve orebody; Mount Tom), Scheelite, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA
Unspecified W occurrence [2], Round Valley, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA
Deep Canyon, Tungsten Hills, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA
Birch Creek, White Mountains, Inyo County, California, USA

ⓘ Phosgenite

Formula: Pb2CO3Cl2

Habit: Acicular

Colour: Straw-yellow

Description: Occurs included in quartz.

References:

ⓘ Phosphohedyphane

Formula: Ca2Pb3(PO4)3Cl

ⓘ Pickeringite

Formula: MgAl2(SO4)4 · 22H2O

ⓘ Pinnoite

Formula: Mg[B2O(OH)6]

ⓘ Pirssonite

Formula: Na2Ca(CO3)2 · 2H2O

Description: Occurs as efflorescences and in muds.

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi2]O8

Localities:

Tecopa paleolake deposits, Tecopa, Sperry Hills, Inyo County, California, USA
Papoose Flat pluton, Papoose Flat, Inyo Mts (Inyo Range), Inyo County, California, USA
Birch Creek, White Mountains, Inyo County, California, USA
Franklin Lake playa, Amargosa Desert, Inyo County, California, USA

ⓘ Plancheite

Formula: Cu8(Si8O22)(OH)4 · H2O

ⓘ Plattnerite

Formula: PbO2

Localities:

Queen of Sheba Mine, Warm Spring, Carbonate Mining District, Panamint Mts (Panamint Range), Inyo County, California, USA
Reward Mine, Reward, Russ Mining District, Inyo Mts (Inyo Range), Inyo County, 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 County, 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 County, California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Plumbogummite

Formula: PbAl3(PO4)(PO3OH)(OH)6

Localities:

Reward Mine, Reward, Russ Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA ? (more information)
Cerro Gordo Mine, Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA ? (more information)

ⓘ Plumbojarosite

Formula: Pb0.5Fe3+3(SO4)2(OH)6

Localities: Reported from at least 8 localities in this region.

ⓘ Polybasite

Formula: [Ag6Sb2S7][Ag9CuS4]

Localities:

Cerro Gordo Mine, Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
San Felipe Mine (San Filipe claim), Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Posnjakite

Formula: Cu4(SO4)(OH)6 · H2O

References:

ⓘ Powellite

Formula: Ca(MoO4)

Localities:

Pine Creek Mine (Black Monster Mine; Snow Queen Mine; Pine Creek Tungsten Mine & mill; Pine Creek apt plant; Pine Creek custom mill), Scheelite, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA
Panyo Mine (Panyo Tungsten Mine), Coso [historical], Inyo County, California, USA
Powell Tungsten property, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Unnamed Mo occurrence [4], Big Dodd Spring, Ubehebe Mining District, Cottonwood Mountains, Panamint Mts (Panamint Range), Inyo County, California, USA
Adamson Mine (Panaminas Inc.; Adamson claims; Adamson Tungsten deposit; Wheeler Ridge Tungsten Mine; Blue Jay claim), Scheelite, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA

ⓘ Prehnite

Formula: Ca2Al2Si3O10(OH)2

Localities:

Unnamed Ti occurrence [1], Summit 2347 meters, Nelson Range, Lee Mining District, Inyo County, 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 Mining District (Tungsten Hills Mining District), Inyo County, California, USA

Colour: White

Description: Occurs as crystalline grains to 2 mm.

ⓘ Priceite

Formula: Ca2B5O7(OH)5 · H2O

Localities: Reported from at least 12 localities in this region.

Description: Occurs in near-surface material in colemanite veins.

ⓘ Probertite

Formula: NaCa[B5O7(OH)4] · 3H2O

Localities: Reported from at least 10 localities in this region.

ⓘ Pseudomalachite

Formula: Cu5(PO4)2(OH)4

Localities:

ⓘ 'Psilomelane'

Localities:

Unspecified Mn occurrence [2], Southeast terminus of Panamint Mountains, Panamint Mts (Panamint Range), Inyo County, California, USA
Lillie Mine (Mature Consolidated), Slate Range Mining District (Arondo Mining District), Slate Range, Inyo County, California, USA
Manganite group (Chapin Manganese; Reward group; Reward Nos. 1-3 claims; Goodhope Nos. 1-2 claims; Manganese Nos. 1-4; Wingate Wash), Shore Line Butte, Inyo County, California, USA
Manganite Nos. 1-3 claims (Canam Mine; DV group), Wingate Wash, Panamint Mts (Panamint Range), Inyo County, California, USA

ⓘ Pyrargyrite

Formula: Ag3SbS3

ⓘ Pyrite

Formula: FeS2

Localities: Reported from at least 83 localities in this region.

ⓘ Pyrolusite

Formula: Mn4+O2

Localities: Reported from at least 9 localities in this region.

Description: Occurs in oxidized zones.

ⓘ Pyromorphite

Formula: Pb5(PO4)3Cl

Localities: Reported from at least 10 localities in this region.

ⓘ Pyrophyllite

Formula: Al2Si4O10(OH)2

Localities:

Imus Mine (Imus deposit), Fish Springs, Fish Springs Mining District (Tinemaha Mining district), Owens Valley, Inyo County, California, USA
Pacific Coast Pyrophyllite Mine, White Mountains, Inyo County, California, USA
Unnamed Pyrophyllite occurrence [1], Sheephead Pass, Ibex Hills, Inyo County, California, USA

Description: Mined commercially.

ⓘ 'Pyroxene Group'

Formula: ADSi2O6

Localities:

R & R claims, Black Canyon Spring, White Mountains, Inyo County, California, USA
Round Valley Mine (Nobles Camp; Big Shoot Noble; Brooks Mine; Silver Bell; Silver Ball; Western Tungsten; Big Shot; Haco; Tungsten Hill Mine DMEA-2256), West Bishop, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA

ⓘ Pyrrhotite

Formula: Fe1-xS

Localities: Reported from at least 18 localities in this region.

Description: Small quantities occur in ores.

ⓘ Quartz

Formula: SiO2

Localities: Reported from at least 238 localities in this region.

ⓘ Quartz var. Amethyst

Formula: SiO2

ⓘ Quartz var. Chalcedony

Formula: SiO2

Localities: Reported from at least 6 localities in this region.

ⓘ Quartz var. Rock Crystal

Formula: SiO2

ⓘ Quartz var. Smoky Quartz

Formula: SiO2

Localities:

Unnamed Amazonite occurrence [1], Haystack Mountain (Haystack; Boulder Mountain; Kern Knob), Inyo Mts (Inyo Range), Inyo County, California, USA
Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Crystal Ridge, Johnson Spring, Tibbetts Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Ramdohrite

Formula: Pb5.9Fe0.1Mn0.1In0.1Cd0.2Ag2.8Sb10.8S24

ⓘ Realgar ?

Formula: As4S4

ⓘ Rhodochrosite

Formula: MnCO3

ⓘ Rhomboclase

Formula: (H5O2)Fe3+(SO4)2 · 2H2O

ⓘ Rickardite

Formula: Cu7Te5

ⓘ Rivadavite

Formula: Na6Mg[B6O7(OH)6]4 · 10H2O

Description: Occurs with other efforescent borate minerals on weathered veins of colemanite-priceite in altered Furnace Creek Formation rocks.

ⓘ Rosasite

Formula: (Cu,Zn)2(CO3)(OH)2

Localities: Reported from at least 9 localities in this region.

ⓘ Rosickýite

Formula: S

Description: Formed in bacterial mats.

ⓘ Rutile

Formula: TiO2

Localities:

Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Chris Lehmann Anatase prospect, White Mountains, Inyo County, California, USA
Inyo County, California, USA
Badwater Turtleback core complex, Black Mountains, Amargosa Range, Inyo County, California, USA

ⓘ Rutile var. Ilmenorutile

Formula: (Ti,Nb)O2

ⓘ Sanidine

Formula: K(AlSi3O8)

Localities:

Little Chief Granite Dome, Panamint (old Panamint), Panamint Mining District (Ballarat Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA
Unspecified Feldspar occurrence [2], Bishop, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA

ⓘ Santite

Formula: K[B5O6(OH)4] · 2H2O

ⓘ Saponite

Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O

Localities:

Ballarat Saponite deposit, Ballarat, Panamint Mining District (Ballarat Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA
Badwater Basin, Inyo County, California, USA
Unnamed Saponite occurrence [1], Twelvemile Spring, Chicago Valley, Lake Tecopa Basin, Inyo County, California, USA

ⓘ Saponite var. Lithian Saponite

Formula: Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2 · nH2O

ⓘ Sassolite

Formula: H3BO3

Localities:

Upper Biddy Mine (Upper Biddy McCarthy Mine; Big Biddy Mine), Biddy McCarthy Mines, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
South Meridian claim, Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Mott prospect (Mott Colemanite prospect; Mott open cut), Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
East Coleman Mine, Furnace Creek, Inyo County, California, USA
Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA

ⓘ Sborgite

Formula: Na[B5O6(OH)4] · 3H2O

Localities:

Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
South Meridian claim, Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Hard Scramble claim, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Twenty Mule Team Road occurrences, Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Widow No. 3 Mine (New Widow), Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA

ⓘ 'Scapolite'

Localities:

Unspecified Cu occurrence [3], Big Dodd Spring, Ubehebe Mining District, Cottonwood Mountains, Panamint Mts (Panamint Range), Inyo County, 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 Mining District (Tungsten Hills Mining District), Inyo County, California, USA

ⓘ Scheelite

Formula: Ca(WO4)

Localities: Reported from at least 88 localities in this region.

ⓘ 'Schirmerite'

Formula: PbAgBi3S6 - Pb3Ag1.5Bi3.5S9

ⓘ Schmiederite

Formula: Pb2Cu2(Se6+O4)(Se4+O3)(OH)4

ⓘ Schulenbergite

Formula: (Cu,Zn)7(SO4)2(OH)10 · 3H2O

Localities:

War Eagle Mine, Shoshone Mines (Shoshone Mines group; Shoshone Mine group; Grant Mine; Mabel Mine; Black Prince Mine), Upper Noonday Camp, Nopah Range, Inyo County, California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Scorodite

Formula: Fe3+AsO4 · 2H2O

Localities:

Shoshone Mines (Shoshone Mines group; Shoshone Mine group; Grant Mine; Mabel Mine; Black Prince Mine), Upper Noonday Camp, Nopah Range, Inyo County, California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, 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 County, California, USA

ⓘ Searlesite

Formula: Na(H2BSi2O7)

Localities:

Ash Meadows Zeolite deposit, Shoshone, Dublin Hills, Inyo County, California, USA
Unnamed Borate occurrence [30], Furnace Creek, Inyo County, California, USA
Lake Tecopa Zeolite deposit, Lake Tecopa Basin, Inyo County, California, USA

ⓘ Selenium

Formula: Se

Localities:

Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Darwin Mining District, Darwin Hills, Inyo County, 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 Mining District, Darwin Hills, Inyo County, California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, California, USA

Description: 800 level, Defiance workings

ⓘ Senarmontite

Formula: Sb2O3

Localities:

Darwin Mining District, Darwin Hills, Inyo County, California, USA
Darwin Antimony Mine, Ophir Mountain, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Skidoo Mining Company property, Wildrose Mining District (Wild Rose Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA
Wild Rose Antimony deposits (Wild Rose Antimony Mine; Wildrose Antimony Mine; Wildrose Mine; Antimonium; Wild Rose Canyon Antimony deposits), Wildrose Peak, Wildrose Mining District (Wild Rose Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA

ⓘ Sepiolite

Formula: Mg4(Si6O15)(OH)2 · 6H2O

Localities:

Eagle Borax Spring, Inyo County, California, USA
Saline Valley, Inyo County, California, USA
Ballarat Saponite deposit, Ballarat, Panamint Mining District (Ballarat Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA
Half Dollar Mine, Inyo County, California, USA ? (more information)

ⓘ Serpierite

Formula: Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O

Localities:

Darwin Mining District, Darwin Hills, Inyo County, California, USA
Lucky Lucy Mine, Darwin, Darwin Mining District, Darwin Hills, Inyo County, 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 County, California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ Shattuckite

Formula: Cu5(Si2O6)2(OH)2

ⓘ Siderite

Formula: FeCO3

Localities: Reported from at least 7 localities in this region.

ⓘ 'Silica'

Localities: Reported from at least 14 localities in this region.

ⓘ Sillimanite

Formula: Al2(SiO4)O

Description: Occurs as random fibers, abundant in schist.

ⓘ Silver

Formula: Ag

Localities: Reported from at least 11 localities in this region.

ⓘ ~~Skutterudite~~

Formula: CoAs3

ⓘ 'Smectite Group'

Formula: A0.3D2-3[T4O10]Z2 · nH2O

ⓘ Smithsonite

Formula: ZnCO3

Localities: Reported from at least 34 localities in this region.

Description: Occurs in abundance; unusual stalactitic forms in the limestone footwall.

ⓘ Spessartine

Formula: Mn2+3Al2(SiO4)3

Localities:

Pine Creek Mine (Black Monster Mine; Snow Queen Mine; Pine Creek Tungsten Mine & mill; Pine Creek apt plant; Pine Creek custom mill), Scheelite, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA
Unspecified Garnet Group occurrences [2], Tungsten Hills, West Bishop, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA

ⓘ Sphalerite

Formula: ZnS

Localities: Reported from at least 52 localities in this region.

ⓘ Spinel

Formula: MgAl2O4

Localities:

Birch Creek, White Mountains, Inyo County, California, USA
Unnamed Spinel occurrence [1], Butte Valley (Hidden Valley), Butte Valley Mining District, Panamint Mts (Panamint Range), Inyo County, California, USA

ⓘ Spinel var. Pleonaste

Formula: (Mg,Fe)Al2O4

ⓘ Spurrite (TL)

Formula: Ca5(SiO4)2(CO3)

Localities:

Paraspurrite type locality, Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Stannite

Formula: Cu2FeSnS4

Localities:

Thompson Mine, Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Darwin Mining District, Darwin Hills, Inyo County, California, USA

Description: Occurs in rich Ag ore.

ⓘ Staurolite

Formula: Fe2+2Al9Si4O23(OH)

Localities:

Unnamed Staurolite occurrence [1], Ballarat, Panamint Mining District (Ballarat Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA
Badwater Turtleback core complex, Black Mountains, Amargosa Range, Inyo County, California, USA

Description: Occurs as micro-grains in quartz-mica schist.

ⓘ Staurolite var. Zinc-bearing Staurolite

Formula: (Fe2+,Zn)2Al9Si4O23(OH)

References:

ⓘ Stephanite

Formula: Ag5SbS4

Localities:

Oriental Mine, Deep Springs Valley, Inyo County, California, USA
Belmont Mine, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Cliff Mine, Sentinal Peak, White Mountains, Inyo County, California, USA

ⓘ 'Stibiconite'

Formula: Sb3+Sb5+2O6(OH)

Localities:

Darwin Mining District, Darwin Hills, Inyo County, California, USA
Darwin Antimony Mine, Ophir Mountain, Darwin Mining District, Darwin Hills, Inyo County, California, USA
Wild Rose Antimony deposits (Wild Rose Antimony Mine; Wildrose Antimony Mine; Wildrose Mine; Antimonium; Wild Rose Canyon Antimony deposits), Wildrose Peak, Wildrose Mining District (Wild Rose Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA
Kennedy deposit (Kennedy group; Kennedy claim), Wild Rose Antimony deposits (Wild Rose Antimony Mine; Wildrose Antimony Mine; Wildrose Mine; Antimonium; Wild Rose Canyon Antimony deposits), Wildrose Peak, Wildrose Mining District (Wild Rose Mining District), Panamint Mts (Panamint Range), Inyo County, California, USA

ⓘ Stibnite

Formula: Sb2S3

Localities: Reported from at least 13 localities in this region.

ⓘ Stilbite-Ca

Formula: NaCa4(Si27Al9)O72 · 28H2O

ⓘ 'Stilbite Subgroup'

Formula: M6-7[Al8-9Si27-28O72] · nH2O

Localities:

Unnamed Zeolite occurrence [2], Big Dodd Spring, Ubehebe Mining District, Cottonwood Mountains, Panamint Mts (Panamint Range), Inyo County, California, USA
Bishop Creek Mine (Wilshire Bishop Creek Mine; Wilshire Gold Mine; Cardinal Mine; Cardinal Gold Mining Company claims; Cardinal Gold property; Rocky Point group; Wiltshire), Aspendell, Bishop Creek Mining District, Inyo County, California, USA
Green Eye claim, Summit 2347 meters, Nelson Range, Lee Mining District, Inyo County, California, USA
Unnamed Zeolite occurrence [3], Summit 2347 meters, Nelson Range, Lee Mining District, Inyo County, California, USA

Description: Occurs in aplite.

ⓘ Stilpnomelane ?

Formula: (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O

Description: Possibly celadonite or chlorite per p.c. of Foshag to Murdoch & Webb (1983).

ⓘ Stolzite

Formula: Pb(WO4)

Localities:

Darwin Mining District, Darwin Hills, Inyo County, California, USA
Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA ? (more information)
Thompson Mine, Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin Mining District, Darwin Hills, Inyo County, California, USA ? (more information)

Description: The Mineralogical Record article (Stolburg, C.S., 1984, The mines and minerals of Darwin, California, v15:5) gives an inconclusive old reference suggesting that stolzite was "reported". Tom Moore (2006) added more emphasis: "The "scheelite" specimens, often seen in older collections, were found for decades throughout the district, but probably the best are those which came from the Thompson mine, which ceased operations in 1976. It now turns out that these are not scheelite crystals after all, but something much more intriguing: determinative work done earlier this year at the Mackay School of Mines of the University of Nevada on a batch of old specimens has shown that all of the specimens—all of them in the tested batch, anyway—are stolzite pseudomorphs after scheelite. Since the appearance of all of the "scheelite" crystals on the old Darwin specimens is very much the same, it's at least quite plausible that all are actually stolzite pseudomorphs; these must therefore be counted as among the world's finest stolzites (if you do not hold the pseudomorphism against them), and such is your consolation for having to change your labels." It may be added that the transparent crystals which fluoresce blue white in short wave ultraviolet are probably unaltered and that the pseudomorphs are opaque dark gray.

ⓘ Stringhamite

Formula: CaCu(SiO4) · H2O

References:

ⓘ Stromeyerite

Formula: AgCuS

Localities: Reported from at least 6 localities in this region.

ⓘ Strontianite

Formula: SrCO3

Localities:

Billie Mine, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Unnamed Sr occurrence [1], West of Shoshone, Shoshone, Dublin Hills, Inyo County, California, USA

ⓘ Sulphur

Formula: S8

Localities: Reported from at least 12 localities in this region.

ⓘ Sylvite

Formula: KCl

ⓘ Taenite

Formula: (Fe,Ni)

ⓘ Talc

Formula: Mg3Si4O10(OH)2

Localities: Reported from at least 83 localities in this region.

ⓘ Talc var. Steatite

Formula: Mg3(Si4O10)(OH)2

Localities:

Talc City Mine (Inyo Talc Co. Mine; Sierra Talc and Clay Co.; Simonds Mine; Simonds deposit), Eagle Point, Talc City Mining District, Talc City Hills, Inyo Mts (Inyo Range), Inyo County, California, USA
Eleanor Mine (Eleanor Talc claim), Willow Creek Camp, Inyo Mts (Inyo Range), Inyo County, California, USA
White Eagle Mine (White Eagle Talc Mine; Huntley Mine), Willow Creek Camp, Inyo Mts (Inyo Range), Inyo County, California, USA
Willow Creek Talc Mine (Willow Creek Mine), Willow Creek Camp, Inyo Mts (Inyo Range), Inyo County, California, USA

Colour: Pale green to dull white

Description: Nearly pure talc.

ⓘ Tangeite

Formula: CaCu(VO4)(OH)

ⓘ Tellurium

Formula: Te

ⓘ 'Tennantite Subgroup'

Formula: Cu6(Cu4C2+2)As4S12S

Localities:

Darwin Mining District, Darwin Hills, Inyo County, California, USA
Christmas Gift Mine, Ophir Mountain, Darwin Mining District, Darwin Hills, Inyo County, California, USA

ⓘ Tenorite

Formula: CuO

Localities: Reported from at least 8 localities in this region.

ⓘ Tetradymite

Formula: Bi2Te2S

Localities: Reported from at least 6 localities in this region.

ⓘ 'Tetrahedrite Subgroup'

Formula: Cu6(Cu4C2+2)Sb4S12S

Localities: Reported from at least 28 localities in this region.

ⓘ 'Tetrahedrite Subgroup var. Mercury-bearing Tetrahedrite'

Formula: Cu6[Cu4(Zn,Fe,Hg)2]Sb4S13

ⓘ 'Tetrahedrite Subgroup var. Silver-bearing Tetrahedrite'

Formula: (Cu,Ag)6[Cu4(Fe,Zn)2]Sb4S13

ⓘ Thaumasite

Formula: Ca3(SO4)[Si(OH)6](CO3) · 12H2O

Localities:

Description: Occurs as radiating clusters in the marble.

ⓘ Thénardite

Formula: Na2SO4

Localities: Reported from at least 9 localities in this region.

Description: Occurs with other borate minerals.

ⓘ Thermonatrite

Formula: Na2CO3 · H2O

Localities:

Deep Springs Lake (Deep Springs Playa), Deep Springs Valley, Inyo County, California, USA
Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Widow No. 3 Mine (New Widow), Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Owens Lake, Olancha, Owens Valley, Inyo County, California, USA

Description: Occurs in efflorescences.

ⓘ Tincalconite

Formula: Na2(B4O7) · 5H2O

ⓘ Titanite

Formula: CaTi(SiO4)O

Localities: Reported from at least 10 localities in this region.

Description: Fair sized crystals in tactite.

ⓘ Todorokite

Formula: (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O

Localities:

Unnamed Nobleite locality [1], Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Corkscrew Canyon Mine, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Monte Blanco, Black Mountains, Amargosa Range, Inyo County, California, USA
Monte Blanco Mine, Monte Blanco, Black Mountains, Amargosa Range, Inyo County, California, USA

ⓘ Topaz

Formula: Al2(SiO4)(F,OH)2

Description: A single crystal was found.

ⓘ Torbernite

Formula: Cu(UO2)2(PO4)2 · 12H2O

Localities:

Unspecified U occurrence [2], Oasis area, Fish Lake Valley, Inyo County, California, USA
Golden Nugget prospect [2] (Polaris group), Zinc Hill, Zinc Hill Mining District, Argus Mts (Argus Range), Inyo County, California, USA

Habit: Thin tetragonal plates.

Colour: Green

ⓘ 'Tourmaline'

Formula: A D3G6 (T6O18)(BO3)3X3Z

Localities:

Lee Mining District, Inyo County, California, USA
Deep Canyon, Tungsten Hills, Bishop Mining District (Tungsten Hills Mining District), Inyo County, California, USA
Darwin Mining District, Darwin Hills, Inyo County, California, USA

Colour: Black

ⓘ Tremolite

Formula: ◻Ca2Mg5(Si8O22)(OH)2

Localities: Reported from at least 12 localities in this region.

ⓘ Tridymite

Formula: SiO2

Localities:

Unnamed lava flow [1], Sugarloaf Mountain, Inyo County, California, USA
Little Lake Perlite deposits (Desert Materials Corp. deposit), Sugarloaf Mountain, Inyo County, California, USA
Lake Tecopa Zeolite deposit, Lake Tecopa Basin, Inyo County, California, USA
Tecopa paleolake deposits, Tecopa, Sperry Hills, Inyo County, California, USA

Description: Occurs in spherulites in obsidian.

ⓘ Trolleite ?

Formula: Al4(PO4)3(OH)3

ⓘ Trona

Formula: Na3H(CO3)2 · 2H2O

Localities:

Owens Lake, Olancha, Owens Valley, Inyo County, California, USA
Deep Springs Lake (Deep Springs Playa), Deep Springs Valley, Inyo County, California, USA
Amargosa Valley, Inyo County, California, USA
Bennetts Well, Inyo County, California, USA

Colour: White

Description: LAyers of nearly pure material along shores.

ⓘ Tsumebite

Formula: Pb2Cu(PO4)(SO4)(OH)

ⓘ Tunellite

Formula: SrB6O9(OH)2 · 3H2O

Description: Small, well-formed crystals.

ⓘ Tungstite

Formula: WO3 · H2O

Localities:

Margarita claim, Shepard Canyon, Millspaugh, Argus Mts (Argus Range), Inyo County, California, USA
Darwin Mine (Anaconda; Bernon Mine; Defiance Mine; Essex Mine; Independence Mine; Intermediate Mine; Rip Van Winkle Mine; Thompson Mine), Darwin, Darwin Mining District, Darwin Hills, Inyo County, 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 Mining District, Darwin Hills, Inyo County, California, USA

Description: Occurs on Scheelite.

ⓘ Ulexite

Formula: NaCa[B5O6(OH)6] · 5H2O

Localities: Reported from at least 30 localities in this region.

Description: Occurs as large compact masses with colemanite.

ⓘ 'UM1975-21-Te:BiPbSSe'

Formula: PbBi2(Te,Se)2(S,Se)2

ⓘ Uranophane

Formula: Ca(UO2)2(SiO3OH)2 · 5H2O

Description: Occurs in fracture coatings on granite.

References:

Outerbridge, W. F., Staatz, M. H., Meyrowitz, R., Pommer, A. M. (1960) Weeksite, a new uranium silicate from the Thomas Range, Juab County, Utah. American Mineralogist, 45 (1-2) 39-52

ⓘ Valentinite

Formula: Sb2O3

Localities: Reported from at least 6 localities in this region.

ⓘ Vanadinite

Formula: Pb5(VO4)3Cl

Localities: Reported from at least 7 localities in this region.

Description: Small quantities occur in the oxidation zone.

ⓘ Vanadinite var. Arsenic-bearing Vanadinite

Formula: Pb5[(V,As)O4]3Cl

Description: Occurs as drusy encrustations in ores.

ⓘ Veatchite

Formula: Sr2B11O16(OH)5 · H2O

References:

Pekov, Igor V., Zubkova, Natalia V., Apollonov, Vladimir N., Yapaskupt, Vasiliy O., Britvin, Sergey N., Pushcharovsky, Dmitry Yu. (2024) A New Mineral Calcioveatchite, SrCaB11O16(OH)5·H2O, and the Veatchite–Calcioveatchite Isomorphous Series. Minerals, 14 (9). doi:10.3390/min14090901

ⓘ Veatchite-1M

Formula: Sr2B11O16(OH)5 · H2O

ⓘ Vermiculite

Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O

Description: One of the predominant layer silicates in the playa.

ⓘ Vésigniéite

Formula: BaCu3(VO4)2(OH)2

ⓘ Vesuvianite

Formula: Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9

Localities: Reported from at least 17 localities in this region.

Colour: Dark green

Description: Commohn in the contact zone as masses and crystals in calcite or wollastonite.

ⓘ Vikingite

Formula: Ag5Pb8Bi13S30

ⓘ Vivianite

Formula: Fe2+Fe2+2(PO4)2 · 8H2O

Description: Occurs as crystals on quartz.

ⓘ Volborthite

Formula: Cu3(V2O7)(OH)2 · 2H2O

ⓘ Voltaite

Formula: K2Fe2+5Fe3+3Al(SO4)12 · 18H2O

ⓘ 'Wad'

Localities:

War Baby deposit (Wingate Wash deposit), Sugarloaf Peak, Panamint Mts (Panamint Range), Inyo County, California, USA
Green Monster Mine, Kearsarge, Kearsarge Mining District [2], Inyo Mts (Inyo Range), Inyo County, California, USA ? (more information)

ⓘ Wardsmithite (TL)

Formula: Ca5Mg[B4O7]6 · 30H2O

Localities:

Hard Scramble claim, Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
Oliver claim (Neglect claim; Oliver Consolidated claim), Ryan, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA
South Meridian claim, Twenty Mule Team Canyon, Furnace Creek Mining District (Furnace Creek Borate Mining District), Inyo County, California, USA

Description: Occurs as a weathering product of colemanite-priceite veins. Fine-grained, soft clots up to 75 microns diameter; less complex single crystals to 15 microns diameter and 2 microns thick.

ⓘ Weeksite

Formula: K2(UO2)2(Si5O13) · 4H2O

References:

Outerbridge, W. F., Staatz, M. H., Meyrowitz, R., Pommer, A. M. (1960) Weeksite, a new uranium silicate from the Thomas Range, Juab County, Utah. American Mineralogist, 45 (1-2) 39-52

ⓘ Whelanite

Formula: Cu2+2Ca6[Si6O17(OH)](CO3)(OH)3 · 2H2O

References:

ⓘ Willemite

Formula: Zn2SiO4

Localities:

Cerro Gordo Mine, Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Ignacio Mine (St. Ignacio Mine; Saint Ignacio Mine; Ygnacio Mine), Cerro Gordo Mine, Cerro Gordo, Cerro Gordo Mining District, Inyo Mts (Inyo Range), Inyo County, California, USA
Santa Rosa Mine (Lee-Santa Rosa Mine; Santa Rosa Mines), Malpais Mesa, Inyo Mts (Inyo Range), Inyo County, California, USA

ⓘ 'Wolframite Group'