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Sterryite: Ag2Pb10(Sb,As)12S29
Comments: Back prismatic sterryite microcrystals and massive in white calcite. Location: Taylor Pit, Madoc, Ontario, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Stetefeldtite: Ag2Sb2O6(O,OH)
Comments: Light yellow, massive, earthy stetefeldtite aggregates. Location: Snyder Hill Mine, Tucson Mountains, Pima Co., Arizona, USA. Scale: 2.5x2x1cm. © Tom Loomis / Dakota Matrix
Stevensite: (Ca0.5,Na)0.33(Mg,Fe++)3Si4O10(OH)2·n(H2O)
Comments: Granular massive stevensite. Location: Langban, Varmland, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Stewartite: Mn++Fe+++2(PO4)2(OH)2·8(H2O) Rockbridgeite: (Fe++,Mn)Fe+++4(PO4)3(OH)5
Comments: Pointed, brownish yellow stewartite crystals on massive, dark rockbridgeite. Location: Hagendorf, Bavaria, Germany. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Stibarsen: SbAs
Comments: Massive Stibarsen. Location: Bohemia, Czechoslovakia. Scale: 3 x 2 cm. © John Veevaert
Stibarsen: SbAs Vaughanite: TlHgSb4S7 Paakkonenite: Sb2AsS2
Comments: B&W image of vaughanite (Va) aggregate surrounding a fibrous bundle of paakkonenite (Pfi) and associated with stibarsen (Star) and realgar (Re). Oil immersion. (CanMin, v53:369). Location: Rare primary constituent of the Golden Giant orebody of the Hemlo gold deposit, Hemlo, Ontario, Canada. Scale: See Image. © Canadian Mineralogist
Stibiconite: Sb+++Sb+++++2O6(OH)
Comments: Yellowish druses of microscopic stibiconite pseudomorphic after sharply terminated stibnite crystals. Location: Xi Kuang Shang mine, Len Shui Jiang, Hunan Province, China. Scale: 31x11x8 cm. © Dan Weinrich
Stibioclaudetite: AsSbO3
Comments: Transparent prismatic crystals of stibioclaudetite in a vug. Type specimen for this species.. Location: Tsumeb, Namibia. Scale: See Image. © William Pinch
Stibiopalladinite: Pd5Sb2
Comments: Gray metallic stibiopalladinite, with bronze tarnish, flattened crystal grains. Location: Choco, Columbia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Stibiotantalite: SbTaO4
Comments: Translucent stibiotantalite crystal. Location: Himalaya Mine, Mesa Grande, San Diego County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
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