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Stibivanite: Sb+++2V++++O5
Comments: Green crystals of stibivanite on matrix. Location: Buca della Vena Mine, Stazzema (Ponte Stazzemese), Versilia, Apuan Alps, Lucca Province, Tuscany, Italy. Scale: Picture size 1.5 mm. © Thomas Witzke / Abraxas-Verlag
Stibnite: Sb2S3
Comments: Prismatic crystals of metallic-lustered stibnite. Location: Xikuangshan Mine, Lengshuijang, Hunan Province, China. Scale: Crystal size 5-10 cm. © Dave Barthelmy
Stichtite: Mg6Cr2(CO3)(OH)16·4(H2O)
Comments: Massive, fibrous, lavender-purple stichtite. Location: Kaapsche Hoop, Barberton District, Mpumalanga Province, South Africa. Scale: 5x3x2 cm. © John Betts - Fine Minerals
Stilbite-Ca: NaCa4[Al8Si28O72]·n(H2O) (n=28-32) Apophyllite: KCa4(Si4O10)2F·8(H2O) Apophyllite-(KOH): KCa4Si8O20(OH,F)·8(H2O)
Comments: 3 cm. pink-colored rosette of stilbite and clear "apophyllite" (probably hydroxyapophyllite) in an amygdaloidal cavity. Location: Aurangabad District, Jalgaon, India. Scale: Specimen size 6 cm. © Dave Barthelmy
Stilbite-Ca: NaCa4[Al8Si28O72]·n(H2O) (n=28-32) Apophyllite-(KF): (K,Na)Ca4Si8O20(F,OH)·8(H2O) Apophyllite: KCa4(Si4O10)2F·8(H2O)
Comments: Doubly terminated, very clear and perfect fluorapophyllite with white stilbite. Location: Jalgaon, India. Scale: 4 x 3.5 cm. © Fabre Minerals
Stilbite-Ca: NaCa4[Al8Si28O72]·n(H2O) (n=28-32)
Comments: Tabular, honey-colored stilbite (stilbite-Ca?) crystals on matrix. Location: Gunnedah, New South Wales, Australia. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Stilbite-Ca: NaCa4[Al8Si28O72]·n(H2O) (n=28-32) Thomsonite-Ca: NaCa2Al5Si5O20·6(H2O)
Comments: Peach colored stilbite crystals to 3.5 cm in size is hosting two finely crystallized balls of powdery white thomsonite. Location: Near Jalgaon, Maharashtra State, India. Scale: Picture size 15 cm. © Dan Weinrich
Stilbite-Na: Na3Ca3[Al8Si28O72]·n(H2O) (n=28-32)
Comments: Stibite 'bow-ties' on matrix. Location: Cape Pula, Pula, Cagliari Province, Sardinia, Italy. Scale: Largest Crystal Length 3 cm. © Ed Rosenzweig
Stillwaterite: Pd8As3
Comments: B&W photomicrograph of a stillwaterite grain (gray) associated with native gold. (CanMin, v13:321). Location: Heavy mineral centrates from the Banded and Upper zones of Stillwater Complex, Montana, USA. Scale: See Image. © Canadian Mineralogist
Stillwellite-(Ce): (Ce,La,Ca)BSiO5
Comments: Brownish red euhedral crystal of stillwellite-(Ce) in matrix under halogen or sunlight lighting. Inset image shows the yellow color-change under fluorescent lighting. Location: Darai -Piez Massif, Alay Range of Tien-Shan' Mountains, Garm Region, Tajikistan. Scale: Crystal Size 1.3 cm. © Rob Lavinsky
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
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