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Stranskiite: Zn2Cu++(AsO4)2
Comments: Blue fibrous Stranskiite veinlets in white quartz. Location: Tsumeb, Oshikoto, Namibia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Stratlingite: Ca2Al[(OH)6AlSiO2-3(OH)4-3]·2,5(H2O)
Comments: Transparent blue-tinted platy stratlingite crystal aggregate in vug. Location: Bellerberg, Eifel, Rheinland-Pfalz, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Stronalsite: SrNa2Al4Si4O16 Jadeite: Na(Al,Fe+++)Si2O6
Comments: White stronalsite veinlets in massive pale green jadeite. Location: Ohasa, Okayama, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Strontiodresserite: (Sr,Ca)Al2(CO3)2(OH)4·(H2O)
Comments: Opaque white spherical strontiodresserite, with radial structure. Location: Francon Quarry, Montreal, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Strontiowhitlockite: Sr7(Mg,Ca)3(PO4)6[PO3(OH)] Bobierrite: Mg3(PO4)2·8(H2O)
Comments: Pale white to pink fine grained strontiowhitlockite with bobierrite. Location: Kovdor Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Struverite: (Ti,Ta,Fe+++)O2
Comments: Struverite crystal in white feldspar. Location: Pisek, Jihocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Struvite: (NH4)MgPO4·6(H2O)
Comments: Opaque, white crystal struvite aggregates in earthy matrix. Location: Skipton Caves, Victoria, Australia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Studenitsite: NaCa2[B9O14(OH)4]·2(H2O)
Comments: Pale pink crystalline studenitsite micro fragment. Location: Piskanja, Srbija, Yugoslavia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Sturtite: (Fe3+)(Mn2+,Ca,Mg)Si4O10(OH)3·10(H2O)
Comments: Dark red-brown resinous massive sturtite. Location: North Mine, Broken Hill, New South Wales, Australia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Stutzite: Ag5-xTe3,(x=0.24-0.36)
Comments: Dull black stutzite grains in white-green calcite. Location: Mina Bambollita, Moctezuma, Sonora, Mexico. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species