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Schmiederite: Pb2Cu++2(Se++++O3)(Se++++++O4)(OH)4
Comments: Acicular schmiederite micro crystals in quartz. Location: Condor Mine, La Rioja, Argentina. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Schorlomite: Ca3(Ti,Fe+++,Al)2[(Si,Fe+++,Fe++)O4]3
Comments: Lustrous massive black schorlomite. Location: Magnet Cove, Hot Spring County, Arkansas, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Schreibersite: (Fe,Ni)3P
Comments: Golden metallic schreibersite cleavage fragment from type IIB octahedrite meteorite. Location: Sau Luiao de Moreira Meteorite, Ponte de Lima, Minho, Viana do Castelo, Portugal. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Schuetteite: Hg3(SO4)O2
Comments: Yellow earthy schuetteite coatings. Location: Oceanic Mine, San Luis Obispo County, California. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Seeligerite: Pb3Cl3(IO3)O
Comments: Orange crystalline seeligerite in matrix. Location: Casucha Mine, Sierra Gorda, Antofagasta, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Segnitite: PbFe+++3H(AsO4)2(OH)6
Comments: Translucent yellow crystalline segnitite crust. Location: Kintore Open Cut, Broken Hill, New South Wales, Australia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Seidozerite: (Na,Ca)2(Zr,Ti,Mn)2Si2O7(O,F)2 Arfvedsonite: NaNa2(Fe++4Fe+++)Si8O22(OH)2
Comments: Dark red translucent seidozerite with vitreous, black arfvedsonite. Location: Seidozero Lake, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Sekaninaite: (Fe++,Mg)2Al4Si5O18
Comments: Black-green crystalline sekaninaite cleavage with dark purple colored fracture surface. Location: Rozna, Moravia, Jihomoravsky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Seligmannite: PbCuAsS3 Liveingite: Pb9As13S28
Comments: Black prismatic seligmannite crystals with crystalline black liveingite. Location: Lengenbach Quarry, Binnental, Valais, Switzerland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Senaite: Pb(Ti,Fe,Mn)21O38
Comments: Brownish-black senaite cleavage. Location: Dattas, near Diamantina, Minas Gerais, Brazil. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species