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Spadaite: MgSiO2(OH)2·(H2O) (?)
Comments: Tan mottled silky fibrous spadaite, slightly flexible coatings. Location: Palos Verdes Hills, Los Angeles County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Spangolite: Cu6Al(SO4)(OH)12Cl·3(H2O)
Comments: Blue, hexagonal (trigonal) crystals of spangolite on matrix. Location: Blanchard mine, Bingham, Socorro County, New Mexico, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Spencerite: Zn4(PO4)2(OH)2·3(H2O)
Comments: Pale green pearly translucent spencerite, with divergent structure. Location: Salmo, Nelson Mining District, British Columbia, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Sperrylite: PtAs2
Comments: Tin-white grain of sperrylite in chalcopyrite matrix. Location: Vermillion mine, Sudbury, Ontario, Canada. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Comments: Brilliant, mirror-like modified octahedral crystals of sperrylite to 1.3 cm on chalcopyrite matrix.. Location: Talnak deposit, near Noril'sk, Russia. Scale: 4.4 x 2.3 x 2cm. © Tom Loomis / Dakota Matrix
Sperrylite: PtAs2 Cabriite: Pd2SnCu
Comments: Small crystal of dull gray cabriite on a larger tin-white sperrylite crystal. Location: Dzhezhazgan, Kazakhstan. Scale: Crystal size 1.5 mm. © John Veevaert
Comments: Polished section (PPL) image of a ovoid grain of cabriite (Ca) rimmed by native silver (Ag) in a matrix of brownish cubanite (Cu), with tawny chalcopyrite (Cp). Surrounded on three sides by coarse, millimetric crystals of sperrylite (Sp). Location: Noril’sk-Talnakh mining district of northwestern Russia. (CanMin, v40:473). Scale: Feld of view 1.2 mm. © Canadian Mineralogist
Spertiniite: Cu(OH)2
Comments: Sparse blue spertiniite on serpentinite rock. Location: Jeffrey Quarry, Asbestos, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Spessartine: Mn++3Al2(SiO4)3
Comments: Dodecahedral crystal of spessartine garnet on matrix. Location: Haramosh Mountains, Baltistan, Northern Areas, Pakastan. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Sphaerobertrandite: Be3SiO4(OH)2
Comments: White to pale brownish, radial-concentric aggregates of sphaerobertrandite. Location: Sengischorr Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
Sphaerocobaltite: CoCO3
Comments: Calcite with numerous crystals of red sphaerocobaltite to 3 mm across. Location: Kamoto Mine, Mashamba, Katanga, Dem. Rep. of the Congo. Scale: Picture size 1.5 cm. © John Veevaert
Sphaerocobaltite: CoCO3 Vladimirite: Ca5(AsO3OH)2(AsO4)2·5(H2O)
Comments: Translucent white prismatic vladimirite microcrystals with pink sphaerocobaltite. Location: Irhtem Mine, near Bou Azzer, Ouarzazate, Morocco. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Sphalerite: (Zn,Fe)S
Comments: Highly lustrous, black, complex sphalerite crystals to 15 mm in size completely covering the top of a sulfide matrix. Location: Nanisivik mine, Baffin Island, Northwest Territories, Canada. Scale: 6.5 x 7.5 x 1.8 cm. © Dan Weinrich
Sphalerite: (Zn,Fe)S Ankerite: Ca(Fe++,Mg,Mn)(CO3)2 Dickite: Al2Si2O5(OH)4
Comments: White, rhombohedral crystals of ankerite and dark gray, metallic sphalerite on beige dickite. Location: Prego mine, Kladno, Czech Rebublic. Scale: Picture size 2 cm. © Dave Barthelmy
Sphalerite: (Zn,Fe)S Baumhauerite-2a: Pb3As4S9
Comments: Dark crystal of baumhauerite-2a (same shape as baumhauerite) with olive-green transparent sphalerite crystal on white dolomite. Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Picture 2 cm tall. © Walter Gabriel
Spinel: MgAl2O4
Comments: Spinel on white marble. Location: Mogok, Myanmar. Scale: 2.2 x 1.5 cm. © Fabre Minerals
Spionkopite: Cu1.4S Yarrowite: Cu9S8
Comments: Blue-black metallic granular spionkopite, intermixed with yarrowite altering, with quartz. Location: Yarrow Creek, Alberta, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: Blue-gray metallic yarrowite grains in granular quartz rock with spionkopite. Location: Yarrow Creek, Alberta, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Spiroffite: (Mn,Zn)2Te3O8
Comments: Milky yellow crystalline aggregate of Spiroffite on matrix. Location: Moctezuma mine, Sonora, Mexico. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Spodiophyllite: (Na,K)4(Mg,Fe++)3(Fe+++,Al)2(Si8O24)
Comments: Gray to black prismatic spodiophyllite crystals in matrix. Location: Mt. Kukisvumtchorr, Chibiny, Kola, Russia. Scale: Specimen Size 4x4 cm. © Diederik Visser