's Image Gallery

Spodumene: LiAlSi2O6

Comments: Stacked crystals of Spodumene (Var. Kunzite).
Location: Galileia, Minas Gerais, Brazil. Scale: Crystal size 7 cm.
© Dave Barthelmy

Spriggite: Pb3[(UO2)6O8(OH)2](H2O)x; x ~ 3

Comments: Secondary electron microscope image of spriggite crystals and twins. (AmMin, 89:341).
Location: Number 2 workings, Radium Ridge, Northern Flinders Ranges, South Australia. Scale: See Image.
© American Mineralogist

Spurrite: Ca5(SiO4)2(CO3)  
Bredigite: Ca7Mg(SiO4)4

Comments: White veins of bredigite in massive gray spurrite (slabbed specimen).
Location: Camphouse, Ardnamurchan, Argyll, Highland, Scotland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Spurrite: Ca5(SiO4)2(CO3)

Comments: Dark to light purple massive spurrite (cut face).
Location: South Sister Peak, Tres Hermanas Mountains, Luna County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Squawcreekite: (Fe+++,Sb+++++,W++++++)O4·(H2O)  
Tripuhyite: Fe++Sb+++++O4

Comments: Micro red-orange squawcreekite crystals in matrix. The mineral is now considered to be a Zn-bearing variety of Tripuhyite.
Location: Squaw Creek Tin Mine, Catron County, New Mexico. Scale: Not Given.
© Diederik Visser

Srebrodolskite: Ca2Fe+++2O5  
Periclase: MgO

Comments: Black grains of srebrodolskite with white periclase.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Srebrodolskite: Ca2Fe+++2O5  
Kumtyubeite: Ca5(SiO4)2F2  
Wadalite: Ca6Al5Si2O16Cl3  
Rondorfite: Ca8Mg(SiO4)4Cl2

Comments: BSE image of kumtyubeite (Kmt) associated with srebrodolskite (Srb), bultfonteinite (Blt), Ca- kydrosilicates, wadalite (Wad), rondorfite (Rndr), and ettringite (dark gray). (AmMin, v94:1361).
Location: Rock-forming mineral found in skarn carbonate-xenoliths in ignimbrites of the Upper Chegem volcanic structure, Kabardino-Balkaria, Northern Caucasus, Russia. Scale: See Image.
© American Mineralogist

Srilankite: (Ti,Zr)O2

Comments: Backscatter electron image of srilankite (Sri) - rutile (Rt) - ilmenite (Ilm) composite grain (AmMin, v 89, p 761).
Location: Atlantis II Fracture Zone, Southwest Indian Ridge, Southern Indian Ocean. Scale: See Image.
© American Mineralogist

Stanfieldite: Ca4(Mg,Fe++,Mn)5(PO4)6

Comments: B&W BSE image of a fragment of stanfieldite in an epoxy grain mount.
Location: Brahin Meteorite, Pallasite, Minsk, Belarus (1810). Scale: See Image.
© Diederik Visser

Stanleyite: (V++++O)SO4·6(H2O)  
Patronite: VS4

Comments: Blue crystalline stanleyite on dark patronite.
Location: Minas Ragra, Junin, Peru. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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