Mineral Specimen Images (S)

Stannite: Cu2FeSnS4  
Volfsonite: Cu+10Cu++Fe++Fe+++2Sn++++3S16

Comments: Stannite crystal cluster at the base of a quartz crystal. Volfsonite is now consideres stannite.
Location: Yaogangxian mine, Hunan, China. Scale: Crystal size 3 cm.
© John Attard

Stannite: Cu2FeSnS4  
Zinkenite: Pb9Sb22S42

Comments: Acicular crystals of zinkenite perched on a twinned, crystal of stannite.
Location: Mina San José, Oruro, Bolivia. Scale: 4 x 2.3 x 1.7 cm.
© Fabre Minerals

Stannite: Cu2FeSnS4  
Volfsonite: Cu+10Cu++Fe++Fe+++2Sn++++3S16

Comments: Bluish-black octahedron of stannite (also known as volfsonite).
Location: Yaogangxian Wolfram mine, Yizhang County, Hunan Province, China. Scale: See Image.
© Rruff Database

Stannoidite: Cu8Fe3Sn2S12

Comments: Polished section (PPL) image showing a rim of V-stannoidite on colusite (co) grain in massive bornite (bn).
Location: Kidd Creek Volcanogenic Massive Sulfide deposit, Western Abitibi Subprovince, Timmins, Ontario, Canada. Scale: Picture Size 0.25 mm.
© National Resouces of Canada

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

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

Stannopalladinite: (Pd,Cu)3Sn2 (?)

Comments: PPL polished section image of hexagonal crystal of stannopalladinite (white with a very slight pinkish tint) in white atokite. Inset image x-polarizers.
Location: Oktyabrski Mine, Talnakh, Ural, Russia. Scale: Picture Size 0.57 mm.
© Thomas Witzke

Starkeyite: MgSO4·4(H2O)

Comments: Translucent starkeyite on rock.
Location: Barvue Mine, Barville, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Staurolite: (Fe++,Mg)2Al9(Si,Al)4O20(O,OH)4

Comments: Cruciform twinned staurolite crystals without matrix.
Location: Marble, Cherokee Co., North Carolina, USA. Scale: 3x2.5x1.5 cm.
© John Betts - Fine Minerals

Steacyite: K1-x(Ca,Na)2ThSi8O20 (x=0.2 to 0.4)

Comments: Square prismatic crystal of steacyite on acicular aegirine.
Location: Mont St. Hilaire, Quebec, Canada. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Steenstrupine-(Ce): Na14Ce6Mn++Mn+++Fe++2(Zr,Th)(Si6O18)2(PO4)7·3(H2O)

Comments: Dark gray, coarse grained, elongated crystals of steenstrupine-(Ce) in matrix.
Location: Kvanefield, Ilimanssaq, Greenland. Scale: Specimen Size 5.6 cm.
© Paul M. Schumacher

Steigerite: AlVO4·3(H2O)

Comments: Earthy yellow steigerite masses on sandstone.
Location: Yellow Cat District, Grand County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Stellerite: CaAl2Si7O18·7(H2O)

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

Stellerite: CaAl2Si7O18·7(H2O)

Comments: Orange, blocky crystalline stellerite aggregate.
Location: Tambar Springs, New South Wales, Australia. Scale: Picture size 6x4 cm.
© Dave Barthelmy

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

Stephanite: Ag5SbS4  
Silver: Ag

Comments: Thick, ropy, native silver wires with blocky, well-crystallized stephanite on white and tan calcite matrix.
Location: Freiberg, Erzgebirge, Saxony, Alemania, Germay. Scale: Picture size 3 cm.
© Fabre Minerals

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