Mineral Specimen Images (S)

Stilpnomelane: K(Fe++,Mg,Fe+++)8(Si,Al)12(O,OH)27·n(H2O)

Comments: Golden metallic scaly stilpnomelane on pink orthoclase.
Location: French Creek No. 2 Mine, near Saint Peters, Chester County, Pennsylvania, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Stistaite: SnSb

Comments: Minute stistaite crystal.
Location: Edjej River, Kyrgyzstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Stistaite: SnSb  
Sorosite: Cu(Sn,Sb)  
Tin: Sn

Comments: Back-scattered electron image of large sorosite crystal (So=partly skeletal) adjacent to stistaite (St). Tn=native tin. Note abundant microcrystals of sorosite isolated within native tin. (AmMin 83:903).
Location: Baimka gold-platinum group mineral placer deposit, Chukotka, Russian Far East. Scale: Image Size 1.5 cm.
© American Mineralogist

Stokesite: CaSnSi3O9·2(H2O)

Comments: Colorless transparent stokesite microcrystal in albite.
Location: Corrego do Urucum, Galileia, Minas Gerais, Brazil. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Stokesite: CaSnSi3O9·2(H2O)

Comments: Thick, tabular crystals of stokesite, perched atop a 2 cm sphere of feldspar crystals.
Location: Corrego do Urucum, near Galilea, Minas Gerais, Brazil. Scale: 3.3 x 2.5 x 2 cm.
© Rob Lavinsky

Stokesite: CaSnSi3O9·2(H2O)  
Stannomicrolite: (Sn++,Fe++,Mn++)(Ta,Nb,Sn++++)2(O,OH)7

Comments: Stokesite "ball" composed of lath-like tan or clear crystals with several micro crystals of yellow stannomicrolite.
Location: Urucum mine, Galileia, Minas Gerais, Brazil. Scale: 1.2 cm.
© Tom Loomis / Dakota Matrix

Stolzite: PbWO4

Comments: White stolzite crystals on matrix.
Location: Tuena mine, New South Wales, Australia. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Stornesite-(Y): (Y, Ca)[ ]2Na6(Ca,Na)8(Mg,Fe)43(PO4)36

Comments: BSE image of stornesite-(Y) (Sto) partially surrounding a spherical quartz(Qz)-biotite(Bt) aggregate in apatite (Ap). Other mineral phases include xenotime (Xnt), sillmanite Sil) and corderite (Crd). AmMin, v91, p 1416.
Location: Paragneiss specimens from Johnston Fjord, Stornes Peninsula, Antarctica. Scale: See Image.
© American Mineralogist

Stottite: Fe++Ge(OH)6  
Brunogeierite: (Ge++,Fe++)Fe+++2O4

Comments: Brownish gray, cubic (tetartoidal) brunogeierite crystals with earthy gray stottite and zincian siderite matrix.
Location: Tsumeb, Namibia. Scale: Cabinent Size.
© William Pinch

Straczekite: (Ca,K,Ba)(V5+,V4+)8O20·3H2O

Comments: Greenish-black, prismatic-acicular crystals of straczekite.
Location: Union Carbide Mine, Wilson Springs (Potash Sulfur Springs), Garland Co., Arkansas, USA. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Strakhovite: NaBa3(Mn++,Mn+++)4Si6O19(OH)3

Comments: Dark green vitreous massive strakhovite with inset image of sample.
Location: Dzhavodi Area, Ir-Nimi manganese deposit, Taikan Ridge, Khabarovskiy Kray, Far-Eastern Region, Russia. Scale: See Image.
© Rruff Database

Stranskiite: Zn2Cu++(AsO4)2

Comments: Blue fibrous Stranskiite veinlets in white quartz.
Location: Tsumeb, Oshikoto, Namibia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Strashimirite: Cu8(AsO4)4(OH)4·5(H2O)

Comments: Green, radial sprays of acicular strashimirite crystals on matrix.
Location: Majuba Hill mine, Pershing County, Nevada. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Stratlingite: Ca2Al[(OH)6AlSiO2-3(OH)4-3]·2,5(H2O)

Comments: Transparent blue-tinted platy stratlingite crystal aggregate in vug.
Location: Bellerberg, Eifel, Rheinland-Pfalz, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Strelkinite: Na2(UO2)2V2O8·6(H2O)

Comments: Yellow massive strelkinite.
Location: Basaral occurrence, southwest Balkhash region, Kazakhstan. Scale: See Image.
© Rruff Database

Strengite: Fe+++PO4·2(H2O)

Comments: Pink, bladed, stellate spray of strengite crystals on matrix.
Location: Indian Mountain, Cherokee County, Alabama, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Strengite: Fe+++PO4·2(H2O)  
Cacoxenite: (Fe+++,Al)25(PO4)17O6(OH)12·75(H2O)

Comments: Lilac colored, spear-head shape crystals of strengite to 5mm in large, open vug associated with golden fibrous cacoxenite.
Location: Coon Creek, Polk Co., Arkansas, USA. Scale: Picture size 2 cm.
© Tom Loomis / Dakota Matrix

Strengite: Fe+++PO4·2(H2O)  
Kidwellite: Na(Fe+++,Cu)9+x(PO4)6(OH)11·3(H2O)

Comments: Spherical, crystalline aggregate of purple strengite on green kidwellite.
Location: Three Oak Gap, Polk Co., Arkansas, USA. Scale: Crystal size 2 mm.
© Tom Loomis / Dakota Matrix

Stringhamite: CaCuSiO4·2(H2O)  
Wollastonite-1A: CaSiO3

Comments: Rounded aggregate of dark blue stringhamite crystals on bladed, white wollastonite.
Location: Christmas mine, Hayden, Gila County, Arizona, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Stromeyerite: AgCuS

Comments: 1.5 cm spray of hair-like Stromeyerite crystals on quartz and calcite matrix.
Location: Vrancice near Pribram, Czech Republic. Scale: Picture size 2 cm.
© John Veevaert