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Stellerite: CaAl2Si7O18·7(H2O)
Comments: Orange, blocky crystalline stellerite aggregate. Location: Tambar Springs, New South Wales, Australia. Scale: Picture size 6x4 cm. © Dave Barthelmy
Comments: Hemispherical crystal cluster 35 mm diameter of white stellerite crystals in a pocket lined with drusy quartz. Location: Pune (Poonah), Maharashtra, India. Scale: 13x7x5 cm. © John Betts - Fine Minerals
Stenhuggarite: CaFe+++(As+++O2)(As+++Sb+++O5)
Comments: Aggregate of reddish orange granular stenhuggarite crystals in matrix of black hematite. Location: Langban, Filipstad, Varmland, Sweden. Scale: See Image. © Rruff Database
Stenonite: (Sr,Ba,Na)2Al(CO3)F5
Comments: White nearly opaque stenonite with minor pyrite grains. Location: Ivigtut, Greenland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Stepanovite: NaMgFe+++(C2O4)3·8-9(H2O)
Comments: Translucent yellow crystalline stepanovite fragment. Location: Chai-Tumus, Republic of Sakha, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Stephanite: Ag5SbS4
Comments: Group of steel gray lustrous stephanite crystals to 8 mm in diameter. Caleb Simkoff Collection. Location: Freiberg, Saxony, Germany. Scale: 10 x 12 x 23 mm. © Dan Weinrich
Comments: Dark gray, short, tabular grain of stephanite in quartz. Location: The Zaca mine, Alpine Co., California, USA. Scale: Grain size 0.75mm. © Tom Loomis / Dakota Matrix
Sternbergite: AgFe2S3
Comments: Silvery, blocky to prisimatic sternbergite crystals with minor red pyrargyrite. Location: Jáchymov (St Joachimsthal), Ostrov, Krusné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic. Scale: Specimen Size 13 x 7 x 3.5 cm. © Rob Lavinsky
Steropesite: Tl3BiCl6
Comments: SEM-BSE image of steropesite showing a more complex habit of some crystals. (CanMin, v47:373). Location: La Fossa crater, Vulcano, Aeolian Islands, Italy. Scale: See Image. © Canadian Mineralogist
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