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Sincosite: Ca(V++++O)2(PO4)2·5(H2O) Minyulite: KAl2(PO4)2(OH,F)·4(H2O)
Comments: Pale greenish white acicular radial sprays of minyulite to 8mm with small, green, tabular sincosite. Location: Ross Hannibal mine, Lawrence County, South Dakota. Scale: Picture size 2 cm. © Tom Loomis / Dakota Matrix
Sincosite: Ca(V++++O)2(PO4)2·5(H2O)
Comments: Tabular single crystals of sincosite to 2 mm on drusy quartz. Location: Ross Hannibal Mine, Lawrence Co., South Dakota, USA. Scale: Picture size 1.5 cm. © Tom Loomis / Dakota Matrix
Sinhalite: MgAlBO4
Comments: Crystalline sinhalite in white marble. Location: Amity, near Warwick, Orange County, New York, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Sinjarite: CaCl2·2(H2O)
Comments: Sinjarite specimen sealed in a glass capsule. Location: Cheleken, Caspian Sea, Turkmenistan. Scale: Grid Size 1 mm. © Sergey Vasiliev / Systematic Mineralogy
Sinkankasite: H2MnAl(PO4)2(OH)·6(H2O)
Comments: White crystalline spray of acicular sinkankasite to 1mm on matrix. Location: Barker mine, Keystone, Pennington County, South Dakota, USA. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
Sinnerite: Cu6As4S9
Comments: Blackish-grey aggregate of sinnerite crystals with red realgar on white dolomite. Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Picture high 6 mm. © Walter Gabriel
Sitinakite: Na2K(Ti,Nb)4O4(SiO4)2(O,OH)·4(H2O)
Comments: Beige translucent crudely formed sitinakite (arrow) crystal with white natrolite and dark, acicular aegirine. Location: Mount Kukisvumchorr, Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Sjogrenite: Mg6Fe+++2(CO3)(OH)16·4(H2O)
Comments: Red-brown sjogrenite crust on serpentinite rock. Location: Fort Point, San Francisco County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Skaergaardite: CuPd
Comments: (e) A euhedral crystal of skaergaardite exhibiting the form cube {100} (possibly distorted) included in a bornite-chalcocite i(BN+CC) grain. (f) bornite (BN)+ chalcopyrite (CP) microglobule with a skaergaardite cube with rounded edges. (MinMag 68:615). Location: Drill core taken from the Skaergaard intrusion, Kangerdlugssuaq area, East Greenland. Scale: See Image. © Mineralogical Magazine
Skinnerite: Cu3SbS3
Comments: Dark gray skinnerite on matrix. Location: Bankove, Kosice, Vychodoslovensky, Slovakia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species