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

Formula: Ag2S

Localities:

Mount Gaines Mine (Frenchman Mine; Bearfield Mine; Barfield Mine; Mount Gaines Gold Mine), Quartzburg, Hornitos Mining District, West Belt, Mariposa County, California, USA
Bryant Mine, Striped Rock, Mariposa County, California, USA
Silver Bar Mine (Ryan Silver Mine; Bryant Mine), Bootjack, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Silver Lane Mine (Golden Rod Mine; Wallman Ranch; Silver Lone Mine; Goldenrod; Wellman Ranch), Bootjack, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Modesta Mine, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA

ⓘ Albite

Formula: Na(AlSi3O8)

Localities:

Oro Rico Mine (Penon Blanco Mine), Peñon Blanco Peak, Coulterville, Coulterville Mining District, Mariposa County, California, USA
State highway 49 roadcut, Bagby Bridge, Bagby, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Big Lode Mine, Flyaway group, Buckhorn Peak, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
White Porphyry group, Cat Town, Cat Town Mining District, Mariposa County, California, USA
Mary Harrison group, Coulterville, Coulterville Mining District, Mariposa County, California, USA

ⓘ Alforsite

Formula: Ba5(PO4)3Cl

Description: “Alforsite is.05 mm or smaller grains disseminated in fine-grained metamorphic sanbornite-quartz rock. The alforsite-bearing samples are massive gray rocks with gneissic banding due primarily to segregations of quartz. In prominent bands of pink gillespite, alforsite is associated with sanbornite, witherite, and celsian in quartz-rich and gillespite-rich bands. Fresnoite, walstromite, tourmaline, and pyrite, though less abundant, are disseminated throughout the rock.

ⓘ 'Allanite Group'

Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH)

ⓘ Almandine

Formula: Fe2+3Al2(SiO4)3

ⓘ Altaite

Formula: PbTe

ⓘ Alunite

Formula: KAl3(SO4)2(OH)6

Description: Occurs as a constituent of quartzite.

ⓘ Alunogen

Formula: Al2(SO4)3 · 17H2O

Habit: Fibrous

Description: Fibrous masses on quartzite.

ⓘ Anandite

Formula: (Ba,K)(Fe2+,Mg)3((Si,Al,Fe)4O10)(S,OH)2

References:

Roberts, A. C., Grice, J. D., Dunning, G. E., Venance, K. E. (2001) Fencooperite, Ba6Fe3+3Si8O23(CO3)2Cl3 · H2O, a new mineral species from Trumbull Peak, Mariposa County, California. The Canadian Mineralogist, 39 (4) 1059-1064 doi:10.2113/gscanmin.39.4.1059

ⓘ Andalusite

Formula: Al2(SiO4)O

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

ⓘ Andalusite var. Chiastolite

Formula: Al2(SiO4)O

ⓘ Ankerite

Formula: Ca(Fe2+,Mg)(CO3)2

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

ⓘ Anthophyllite

Formula: ◻{Mg2}{Mg5}(Si8O22)(OH)2

ⓘ Arsenopyrite

Formula: FeAsS

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

ⓘ Arsenopyrite var. Danaite

Formula: (Fe0.90Co0.10)AsS - (Fe0.65Co0.35)AsS

ⓘ 'Asbestos'

ⓘ Azurite

Formula: Cu3(CO3)2(OH)2

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

ⓘ Baryte

Formula: BaSO4

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

ⓘ Bementite

Formula: Mn7Si6O15(OH)8

Localities:

Caldwell Mine (Daly Mine), Granite Springs, Granite Springs Mining District, West Belt, Mariposa County, California, USA
Coulterville area, Coulterville, Coulterville Mining District, Mariposa County, California, USA

ⓘ Benitoite

Formula: BaTi(Si3O9)

ⓘ Bigcreekite

Formula: BaSi2O5 · 4H2O

References:

ⓘ 'Biotite'

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

Localities:

Trumbull Peak Ba-silicate deposit, Trumbull Peak, Clearing House, Clearing House Mining District, East Belt, Mariposa County, California, USA
Silver Knob occurrence, Silver Knob, Fish Camp, Mariposa County, California, USA
Pocohontas Mine, Copper Hill, Green Mountain Mining District (Ben Hur Mining District), Mariposa County, California, USA
B and M Mine (Fournier Mine), Bridgeport, Buckeye Mining District, Mariposa County, California, USA

ⓘ Bornite

Formula: Cu5FeS4

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

ⓘ Calcite

Formula: CaCO3

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

ⓘ Calcite var. Manganese-bearing Calcite

Formula: (Ca,Mn)CO3

Description: 20% to 30% Mn.

ⓘ Celsian

Formula: Ba(Al2Si2O8)

Description: Occurs in veins in quartzite.

ⓘ Cerchiaraite-(Fe)

Formula: Ba4Fe3+4O3(OH)3(Si4O12)[Si2O3(OH)4]Cl

References:

Kampf, A. R., Roberts, A. C., Venance, K. E., Carbone, C., Belmonte, D., Dunning, G. E., Walstrom, R. E. (2013) Cerchiaraite-(Fe) and cerchiaraite-(Al), two new barium cyclosilicate chlorides from Italy and California, USA. Mineralogical Magazine, 77 (1) 69-80 doi:10.1180/minmag.2013.077.1.07

ⓘ Chalcocite

Formula: Cu2S

Localities:

Blue Moon Mine (Porcupine Mine; Blue Cloud Mine; Red Cloud Mine; Percupine Mine; American Eagle Mine; Bullion Hill Mine), Quartzburg, Hornitos Mining District, West Belt, Mariposa County, California, USA
Green Monster Mine (Copper Queen Mine; Copper Mountain Mine; Legioneer Mine), Green Mountain, Green Mountain Mining District (Ben Hur Mining District), Mariposa County, California, USA
La Victoria Mine, Williams Peak, Hunter Valley Mining District, West Belt, Mariposa County, California, USA
Johnnie Green Mine (Johnny Green Mine; Green Mine; Johnny Green Jr. Mine), Copper Hill, Green Mountain Mining District (Ben Hur Mining District), Mariposa County, California, USA
Pocohontas Mine, Copper Hill, Green Mountain Mining District (Ben Hur Mining District), Mariposa County, California, USA ? (more information)

ⓘ Chalcopyrite

Formula: CuFeS2

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

ⓘ Chlorargyrite

Formula: AgCl

ⓘ 'Chlorite Group'

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

ⓘ Chromite

Formula: Fe2+Cr3+2O4

Localities:

Fossow property, Peñon Blanco Peak, Coulterville, Coulterville Mining District, Mariposa County, California, USA
Reed property, Coulterville, Coulterville Mining District, Mariposa County, California, USA
Riverside Chrome Mine (Purcell-Griffin Mine), Horseshoe Bend Mountain, Coulterville, Coulterville Mining District, Mariposa County, California, USA
Unspecified Cr deposits [2], Mariposa County, California, USA

ⓘ Chrysocolla

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

ⓘ Cinnabar

Formula: HgS

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

ⓘ 'Clay minerals'

Localities:

Mockingbird Mine (Talc & Lacy claim), Colorado area, Whitlock Mining District, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Unnamed Clay deposit [1], Webb Station, West Belt, Mariposa County, California, USA

ⓘ Cobaltite

Formula: CoAsS

Description: Occurs as good crystals.

ⓘ Cooperite

Formula: PtS

ⓘ Copper

Formula: Cu

Localities:

Copper Queen I Mine, Mariposa, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Satellite Mine, Mariposa County, California, USA
Green Monster Mine (Copper Queen Mine; Copper Mountain Mine; Legioneer Mine), Green Mountain, Green Mountain Mining District (Ben Hur Mining District), Mariposa County, California, USA
North Fork Chowchilla Creek, Red Mountain, Mariposa County, California, USA
Ward prospect, Indian Peak, Mariposa County, California, USA

Description: Native copper occurs in carbonate (unspecified) ore.

ⓘ Cordierite

Formula: (Mg,Fe)2Al3(AlSi5O18)

ⓘ Corundum

Formula: Al2O3

Habit: Euhedral to subhedral.

Description: Occurs in pegmatites embedded in Muscovite.

ⓘ Covellite

Formula: CuS

Localities:

Tyro Mine (Rittershoffen Mine), Coulterville, Coulterville Mining District, Mariposa County, California, USA
Blue Moon Mine (Porcupine Mine; Blue Cloud Mine; Red Cloud Mine; Percupine Mine; American Eagle Mine; Bullion Hill Mine), Quartzburg, Hornitos Mining District, West Belt, Mariposa County, California, USA
Copper Queen I Mine, Mariposa, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Unnamed Au prospect [15], Quartzburg, Hornitos Mining District, West Belt, Mariposa County, California, USA

ⓘ Cristobalite

Formula: SiO2

Description: Occurs as botryoidal masses lining cavities in dacite.

ⓘ Cuprite

Formula: Cu2O

Localities:

Green Monster Mine (Copper Queen Mine; Copper Mountain Mine; Legioneer Mine), Green Mountain, Green Mountain Mining District (Ben Hur Mining District), Mariposa County, California, USA
Owl Copper Mine (John Diaz Mine), Wildcat Mountain, Cathey Mining District (Cathay Mining District), West Belt, Mariposa County, California, USA

ⓘ Devitoite

Formula: [Ba6(PO4)2(CO3)][Fe2+7(OH)4Fe3+2O2(Si4O12)2]

References:

Kampf, A.R., Rossman, G.R., Steele, I.M., Pluth, J.J., Dunning, G.E., Walstrom, R.E. (2010): Devitoite, a new heterophyllosilicate with astrophyllite-like layers from eastern Fresno County, California. Canadian Mineralogist, 48, 29-40.

ⓘ Diopside

Formula: CaMgSi2O6

ⓘ Dolomite

Formula: CaMg(CO3)2

Localities:

Coulterville, Coulterville Mining District, Mariposa County, California, USA
Oro Rico Mine (Penon Blanco Mine), Peñon Blanco Peak, Coulterville, Coulterville Mining District, Mariposa County, California, USA

ⓘ Dolomite var. Iron-bearing Dolomite

Formula: Ca(Mg,Fe)(CO3)2

Localities:

ⓘ Epidote

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

Localities:

Blue Dipper group, Buena Vista, Mariposa County, California, USA
Southeast side of Mount Hoffman, Mount Hoffman, Yosemite National Park, Mariposa County, California, USA
South side of Mount Hoffman, Mount Hoffman, Yosemite National Park, Mariposa County, California, USA
Blue Dipper Mine (Blue Dipper group), Trumbull Peak, Clearing House, Clearing House Mining District, East Belt, Mariposa County, California, USA

ⓘ Epsomite

Formula: MgSO4 · 7H2O

Habit: Fibrous

Description: Occurs as fine fibers.

ⓘ Erythrite

Formula: Co3(AsO4)2 · 8H2O

ⓘ Esquireite

Formula: BaSi6O13 · 7H2O

References:

Kampf, Anthony R., Housley, Robert M., Dunning, Gail E., Walstrom, Robert E. (2015) ESQUIREITE, BaSi6O13∙7H2O, A NEW LAYER SILICATE FROM THE BARIUM SILICATE DEPOSITS OF CALIFORNIA. The Canadian Mineralogist, 53 (1) 3-12 doi:10.3749/canmin.1400076

ⓘ Fencooperite (TL)

Formula: Ba6Fe3+3Si8O23(CO3)2Cl3 · H2O

Type Locality:

Habit: None

Colour: Black

Fluorescence: None

References:

ⓘ Ferrimolybdite

Formula: Fe2(MoO4)3 · nH2O

ⓘ 'Ferro-actinolite-Tremolite Series'

Localities:

David Gulch-Flyaway Gulch divide, Bagby, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Dragon claim, Charcoal flat, Bagby, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Unnamed Nephrite occurrence [1] (Jade-bearing area), Bagby, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA

ⓘ Ferroericssonite

Formula: BaFe2+2 Fe3+(Si2O7)O(OH)

Localities:

Trumbull Peak Ba-silicate deposit, Trumbull Peak, Clearing House, Clearing House Mining District, East Belt, Mariposa County, California, USA
Trumbull Peak, Clearing House, Clearing House Mining District, East Belt, Mariposa County, California, USA

ⓘ Fluorapatite

Formula: Ca5(PO4)3F

ⓘ 'Freibergite Subgroup'

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

Localities:

Josephine Mine (Pine Tree Mine; Pine Tree Josephine Mine; Pine Tree and Josephine Mine), Pacific Mining Co. group, Bagby, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Coulterville area, Coulterville, Coulterville Mining District, Mariposa County, California, USA

ⓘ Fresnoite

Formula: Ba2Ti(Si2O7)O

ⓘ Gahnite

Formula: ZnAl2O4

ⓘ Galena

Formula: PbS

Localities: Reported from at least 44 localities in this region.

ⓘ Galena var. Silver-bearing Galena

Formula: PbS with Ag

Localities:

Whitlock Mine (Whitlock group; Consolidated Whitlock and Alabama; Westward claim; Alabama claim; Whitlock claim), Whitlock (Farmer's Hope; Whitlock Creek; Whitlock Gulch), Whitlock Mining District, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Early Mine (Early claim; George placer; Felix Lode claim; Revel claim; Revel No. 2 claim; Louisa claim), Sweetwater Point, Jerseydale Mining District, East Belt, Mariposa County, California, USA

Description: Locally prominent.

ⓘ 'Garnet Group'

Formula: X3Z2(SiO4)3

Localities:

Blue Dipper group, Buena Vista, Mariposa County, California, USA
Southeast side of Mount Hoffman, Mount Hoffman, Yosemite National Park, Mariposa County, California, USA
Blue Dipper Mine (Blue Dipper group), Trumbull Peak, Clearing House, Clearing House Mining District, East Belt, Mariposa County, California, USA

ⓘ 'Garnierite'

ⓘ Gersdorffite

Formula: NiAsS

Localities:

Oro Rico Mine (Penon Blanco Mine), Peñon Blanco Peak, Coulterville, Coulterville Mining District, Mariposa County, California, USA
Josephine Mine (Pine Tree Mine; Pine Tree Josephine Mine; Pine Tree and Josephine Mine), Pacific Mining Co. group, Bagby, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA

ⓘ Gillespite

Formula: BaFe2+Si4O10

ⓘ Goethite

Formula: α-Fe3+O(OH)

Localities:

Merced River, Mariposa County, California, USA
Smith Creek Placer Mine, Greeley Hill, Kinsley Mining District, East Belt, Mariposa County, California, USA
Unnamed Goethite occurrence [1], Burns Creek, West Belt, Mariposa County, California, USA

ⓘ Gold

Formula: Au

Localities: Reported from at least 370 localities in this region.

Habit: Wire and arborescent.

Colour: Gold

Description: Included wire and arborescent material.

ⓘ 'Gold Amalgam'

✪ 'Goldamalgam (of Chen et al.)'

Formula: (Au,Ag)Hg

Habit: isometric

Colour: silver

Description: Probably of post-mining origin, by reaction with mercury spilled from sluice boxes, so partly anthropogenic.

ⓘ Graphite

Formula: C

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

Description: Occurs in quartz-mica-graphite phyllite situated between the 2 veins of ore.

ⓘ Hausmannite

Formula: Mn2+Mn3+2O4

ⓘ Hematite

Formula: Fe2O3

Localities:

Blue Moon Mine (Porcupine Mine; Blue Cloud Mine; Red Cloud Mine; Percupine Mine; American Eagle Mine; Bullion Hill Mine), Quartzburg, Hornitos Mining District, West Belt, Mariposa County, California, USA
La Victoria Mine, Williams Peak, Hunter Valley Mining District, West Belt, Mariposa County, California, USA
Unnamed Au property [55], Quartzburg, Hornitos Mining District, West Belt, Mariposa County, California, USA

ⓘ Hessite

Formula: Ag2Te

ⓘ 'Hornblende Root Name Group'

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

Description: Occurs in diorite.

ⓘ Ilmenite

Formula: Fe2+TiO3

Description: Occurs as a constituent of an adamellite [quartz monzonite].

ⓘ Ilmenite var. Manganese-bearing Ilmenite

Formula: (Fe,Mn)2+TiO3

Description: Occurs as a constituent of an adamellite [quartz monzonite].

ⓘ Iridium

Formula: (Ir,Os,Ru)

ⓘ Isoferroplatinum

Formula: Pt3Fe

ⓘ 'Jasper'

ⓘ Kaolinite

Formula: Al2(Si2O5)(OH)4

Localities:

Akoz Mine (Asposozien Mine; B.A.B. Mine; Radium Mine), Webb Station, West Belt, Mariposa County, California, USA
Fitch Mine, Webb Station, West Belt, Mariposa County, California, USA

ⓘ Kinoshitalite

Formula: (Ba,K)(Mg,Mn2+,Al)3(Al2Si2O10)(OH)2

ⓘ Krauskopfite

Formula: BaSi2O5 · 3H2O

ⓘ Lazulite

Formula: MgAl2(PO4)2(OH)2

ⓘ 'Limonite'

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

ⓘ Macdonaldite

Formula: BaCa4Si16O36(OH)2 · 10H2O

ⓘ Maghemite

Formula: (Fe3+0.67◻0.33)Fe3+2O4

ⓘ Magnesiochromite

Formula: MgCr2O4

ⓘ Magnesite

Formula: MgCO3

Localities:

Big Spring Hill deposit (Ashworth Ranch deposit), Mormon Bar, Mormon Bar Mining District, Mariposa County, California, USA
Oro Rico Mine (Penon Blanco Mine), Peñon Blanco Peak, Coulterville, Coulterville Mining District, Mariposa County, California, USA

ⓘ Magnetite

Formula: Fe2+Fe3+2O4

ⓘ Malachite

Formula: Cu2(CO3)(OH)2

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

ⓘ Marcasite

Formula: FeS2

ⓘ Melonite

Formula: NiTe2

ⓘ Mercury

Formula: Hg

Description: Reported from an unspecified location associated with goldamalgam.

ⓘ Metatorbernite

Formula: Cu(UO2)2(PO4)2 · 8H2O

ⓘ Millerite

Formula: NiS

Localities:

ⓘ Molybdenite

Formula: MoS2

Description: Occurs in a lens.

ⓘ Muscovite

Formula: KAl2(AlSi3O10)(OH)2

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

Description: Occurs in pegmatites.

ⓘ Muscovite var. Barium-Vanadium-Muscovite

Formula: KAl2(AlSi3O10)(OH)2

Colour: Bluish green

ⓘ Muscovite var. Mariposite (FRL)

Formula: K(Al,Cr)2(Al,Si)4O10(OH)2

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

Description: Commonly occurs in schists and ankerite-quartz rock of gold veins.

ⓘ Muscovite var. Phengite

Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2

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

Description: Commonly occurs in schists and ankerite-quartz rock of gold veins.

ⓘ Muscovite var. Sericite

Formula: KAl2(AlSi3O10)(OH)2

Localities:

Akoz Mine (Asposozien Mine; B.A.B. Mine; Radium Mine), Webb Station, West Belt, Mariposa County, California, USA
Blue Moon Mine (Porcupine Mine; Blue Cloud Mine; Red Cloud Mine; Percupine Mine; American Eagle Mine; Bullion Hill Mine), Quartzburg, Hornitos Mining District, West Belt, Mariposa County, California, USA
Oro Rico Mine (Penon Blanco Mine), Peñon Blanco Peak, Coulterville, Coulterville Mining District, Mariposa County, California, USA
Mary Harrison group, Coulterville, Coulterville Mining District, Mariposa County, California, USA
Donnelly Carrier prospect (Donnelly property), Sweetwater Point, Jerseydale Mining District, East Belt, Mariposa County, California, USA

ⓘ Népouite

Formula: Ni3Si2O5(OH)4

ⓘ Nickeline

Formula: NiAs

ⓘ Nontronite

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

ⓘ Osmium

Formula: (Os,Ir,Ru)

ⓘ Pellyite

Formula: Ba2Ca(Fe,Mg)2Si6O17

ⓘ Pentlandite

Formula: (NixFey)Σ9S8

ⓘ Petzite

Formula: Ag3AuTe2

ⓘ Piemontite

Formula: (CaCa)(AlAlMn3+)O[Si2O7][SiO4](OH)

Description: Occurs as grains in ore.

ⓘ Pitticite

Formula: (Fe, AsO4, H2O) (?)

Colour: Dark brown

Description: Resembles limonite, amorphous with scorodite and partially altered arsenopyrite.

ⓘ Platinum

Formula: Pt

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

ⓘ Proustite

Formula: Ag3AsS3

Localities:

ⓘ 'Psilomelane'

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

ⓘ Pyrargyrite

Formula: Ag3SbS3

Localities:

Bryant Mine, Striped Rock, Mariposa County, California, USA
Georgia Mine, Quartzburg, Hornitos Mining District, West Belt, Mariposa County, California, USA
Silver Bar Mine (Ryan Silver Mine; Bryant Mine), Bootjack, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Silver Lane Mine (Golden Rod Mine; Wallman Ranch; Silver Lone Mine; Goldenrod; Wellman Ranch), Bootjack, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Washington Mine (Red Cloud Mine; Johnny Lind Mine; Jenny Lind Mine), Hornitos, Hornitos Mining District, West Belt, Mariposa County, California, USA

ⓘ Pyrite

Formula: FeS2

Localities: Reported from at least 81 localities in this region.

ⓘ Pyrite var. Gold-bearing Pyrite

Formula: FeS2

ⓘ Pyrolusite

Formula: Mn4+O2

Localities:

Donnelly Carrier prospect (Donnelly property), Sweetwater Point, Jerseydale Mining District, East Belt, Mariposa County, California, USA
Caldwell Mine (Daly Mine), Granite Springs, Granite Springs Mining District, West Belt, Mariposa County, California, USA
Kelm prospect, Jasper Point, Hunter Valley Mountain, Hunter Valley Mining District, West Belt, Mariposa County, California, USA
Strickland prospect (Strickland deposit; Mabold and Camin prospect), Feliciana Mountain, Jerseydale Mining District, East Belt, Mariposa County, California, USA
Unspecified Mn occurrence [1], Hunter Valley, Hunter Valley Mining District, West Belt, Mariposa County, California, USA

ⓘ Pyromorphite

Formula: Pb5(PO4)3Cl

Description: Occurs in small amounts in local mines.

ⓘ Pyrophyllite

Formula: Al2Si4O10(OH)2

Localities:

Pyrophyllite occurrence near Indian Gulch, Three Buttes (Tres Cerritos), Hornitos Mining District, West Belt, Mariposa County, California, USA

~~Indian Gulch Mine, Santa Cruz Mountain, Hornitos Mining District, West Belt, Mariposa County, California, USA~~

(more information)

Colour: Golden-yellow

Description: Radiating tufts.

ⓘ Pyrrhotite

Formula: Fe1-xS

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

ⓘ Quartz

Formula: SiO2

Localities: Reported from at least 285 localities in this region.

ⓘ Quartz var. Milky Quartz

Formula: SiO2

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

ⓘ Rhodochrosite

Formula: MnCO3

ⓘ Rhodonite

Formula: CaMn3Mn[Si5O15]

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

ⓘ Ruthenium

Formula: (Ru,Ir)

ⓘ Rutile

Formula: TiO2

Localities:

Merced River, Mariposa County, California, USA
Mary Harrison Mine, Mary Harrison group, Coulterville, Coulterville Mining District, Mariposa County, California, USA
Oro Rico Mine (Penon Blanco Mine), Peñon Blanco Peak, Coulterville, Coulterville Mining District, Mariposa County, California, USA

ⓘ Sanbornite (TL)

Formula: Ba2(Si4O10)

Type Locality:

ⓘ Scheelite

Formula: Ca(WO4)

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

ⓘ Schorl

Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)

ⓘ Scorodite

Formula: Fe3+AsO4 · 2H2O

Colour: Pale green

Description: Occurs as crystals.

ⓘ 'Serpentine Subgroup'

Formula: D3[Si2O5](OH)4

Localities:

Oro Rico Mine (Penon Blanco Mine), Peñon Blanco Peak, Coulterville, Coulterville Mining District, Mariposa County, California, USA
Unnamed Serpentine occurrence [1], Three Buttes (Tres Cerritos), Hornitos Mining District, West Belt, Mariposa County, California, USA
Big Lode Mine, Flyaway group, Buckhorn Peak, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Sonora Marble Aggregates Company Quarry, Buckhorn Peak, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Mary Harrison Mine, Mary Harrison group, Coulterville, Coulterville Mining District, Mariposa County, California, USA

ⓘ 'Serpentine Subgroup var. Bastite'

Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn

ⓘ Siderite

Formula: FeCO3

ⓘ Sillimanite

Formula: Al2(SiO4)O

Localities:

Unspecified Mariposa area occurrences, Mariposa, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Unnamed Sillimanite occurrence [1], May Lake, Yosemite National Park, Mariposa County, California, USA

Habit: Prismatic

Colour: Silvery

Description: Occurs as minute silvery prisms in schists.

ⓘ Silver

Formula: Ag

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

ⓘ Silver var. Native Amalgam

Formula: (Ag,Hg)

ⓘ Skutterudite

Formula: CoAs3

ⓘ Spessartine

Formula: Mn2+3Al2(SiO4)3

ⓘ Sphalerite

Formula: ZnS

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

Fluorescence: Triboluminescent

Description: Fine-grained material mixed with other species.

ⓘ Staurolite

Formula: Fe2+2Al9Si4O23(OH)

ⓘ Sulphur

Formula: S8

Localities:

Unnamed S-Hg occurrence [1], Horseshoe Bend Mountain, Coulterville, Coulterville Mining District, Mariposa County, California, USA
Hornitos, Hornitos Mining District, West Belt, Mariposa County, California, USA
Unnamed Au prospect [15], Quartzburg, Hornitos Mining District, West Belt, Mariposa County, California, USA

ⓘ Talc

Formula: Mg3Si4O10(OH)2

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

ⓘ Tellurium

Formula: Te

ⓘ Tenorite

Formula: CuO

Localities:

Buchanan Mine, Hunter Valley, Hunter Valley Mining District, West Belt, Mariposa County, California, USA
Satellite Mine, Mariposa County, California, USA
White Rock Mine (Copper King Mine; White Knob Mine; White Rock Copper King Mine), Helm Ranch, Round Hills, Cathey Mining District (Cathay Mining District), West Belt, Mariposa County, California, USA

Description: Termed "black oxide."

ⓘ Tephroite

Formula: Mn2+2SiO4

Description: Occurs as micro-crystals of plumose material.

ⓘ Tetraferroplatinum

Formula: PtFe

ⓘ 'Tetrahedrite Subgroup'

Formula: Cu6(Cu4C2+2)Sb4S12S

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

ⓘ Titanite

Formula: CaTi(SiO4)O

ⓘ Titantaramellite (TL)

Formula: Ba4(Ti,Fe3+,Fe2+,Mg)4(B2Si8O27)O2Clx

Type Locality:

ⓘ Todorokite

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

ⓘ 'Tourmaline'

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

Localities:

ⓘ 'Tourmaline var. Vanadium Tourmaline'

Formula: A(D3)G6(T6O18)(BO3)3X3Z

Colour: Green

Description: vanadium-rich Dravite which occurs as crystals.

ⓘ Tremolite

Formula: ◻Ca2Mg5(Si8O22)(OH)2

Localities:

Blue Dipper group, Buena Vista, Mariposa County, California, USA
Blue Dipper Mine (Blue Dipper group), Trumbull Peak, Clearing House, Clearing House Mining District, East Belt, Mariposa County, California, USA

ⓘ Tyuyamunite

Formula: Ca(UO2)2(VO4)2 · 5-8H2O

Description: Occurs in a clay seam between granite and slate.

ⓘ Uraninite

Formula: UO2

Description: A minor constituent in granite.

ⓘ Vesuvianite

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

ⓘ 'Wad'

Localities:

Mockingbird Mine (Talc & Lacy claim), Colorado area, Whitlock Mining District, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA
Colorado Mine (Colorado Quartz Mine; Colorado Quartz claim), Colorado, Colorado Mining District, Whitlock Mining District, Bagby-Mariposa-Mount Bullion-Whitlock Mining District, Mariposa County, California, USA

ⓘ Walstromite

Formula: BaCa2(Si3O9)

ⓘ Witherite

Formula: BaCO3

Localities:

El Portal, Mariposa County, California, USA
Trumbull Peak Ba-silicate deposit, Trumbull Peak, Clearing House, Clearing House Mining District, East Belt, Mariposa County, California, USA
El Portal Mine (El Portal Barite Mine; Barium 1 claim; Barium 2 claim; North Barium claim; South Barium claim), El Portal, Mariposa County, California, USA
Devil's Gulch deposit (Egenhoff property; Barium No. 2 & No. 3 claims; North Barium Fractional claim; Barium No. 3 claim; South Fractional claim; Camp Lode claim), Peachtree Bar, Hite Cove Mining District, East Belt, Mariposa County, California, USA ? (more information)

ⓘ Wollastonite

Formula: Ca3(Si3O9)

Localities: