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Soddyite: (UO2)2SiO4·2(H2O)
Comments: Yellow crystals of soddyite. Location: Swambo mine, Mindingi, Shaba, Democratic Republic of the Congo. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Sonoraite: Fe+++Te++++O3(OH)·(H2O)
Comments: Lime green crystalline aggregate of sonoraite. Location: Joe Shaft, Tombstone, Cochise County, Arizona, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
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
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
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
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
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
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
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
Stolzite: PbWO4
Comments: White stolzite crystals on matrix. Location: Tuena mine, New South Wales, Australia. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Strashimirite: Cu8(AsO4)4(OH)4·5(H2O)
Comments: Green, radial sprays of acicular strashimirite crystals on matrix. Location: Majuba Hill mine, Pershing County, Nevada. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Strengite: Fe+++PO4·2(H2O)
Comments: Pink, bladed, stellate spray of strengite crystals on matrix. Location: Indian Mountain, Cherokee County, Alabama, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Stringhamite: CaCuSiO4·2(H2O) Wollastonite-1A: CaSiO3
Comments: Rounded aggregate of dark blue stringhamite crystals on bladed, white wollastonite. Location: Christmas mine, Hayden, Gila County, Arizona, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Strontiojoaquinite: (Na,Fe++)2Ba2Sr2Ti2[Si4O12]2(O,OH)2·(H2O)
Comments: Yellow, pointed crystals of Strontiojoaquinite on matrix. Location: Mina Numero Uno, San Benito County, California, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Strunzite: Mn++Fe+++2(PO4)2(OH)2·6(H2O)
Comments: Acicular, stellate sprays of strunzite crystals on matrix. Location: Palermo #1 mine, North Groton, Grafton County, New Hampshire, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Studtite: [(UO2)O2(H2O)2](H2O)2 Billietite: Ba(UO2)6O4(OH)6·8(H2O)
Comments: Acicular, white sprays of studtite crystals on yellow, tabular billietite. Location: Shinkolobwe mine, Tantara, Shaba, Democratic Republic of the Congo. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Svabite: Ca5(AsO4)3F
Comments: Prismatic white crystals of svabite on matrix. Location: Harstig mine, Pajsberg, Varmland, Sweden. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Symplesite: Fe++3(AsO4)2·8(H2O)
Comments: Fan-shaped spray of acicular symplesite on matrix. Location: Saubachthal, Saxony, Germany. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Synchysite-(Ce): CaCe(CO3)2F
Comments: Prismatic crystals of synchysite-(Ce) on matrix. Location: Kaiserer quarry, Raurisertal, Salzburg, Austria. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Talc: Mg3Si4O10(OH)2
Comments: White Talc pseudomorphous after quartz. Location: Johannezeche, Bavaria, Germany. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals