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Shuiskite: Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2·(H2O)
Comments: Acicular shuiskite microcrystal sprays with epidote and prehnite. Location: Quincy Mine, Hancock, Houghton County, Michigan, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Sibirskite: CaHBO3
Comments: Translucent granular sibirskite. Location: Novofrolovskoye, Sverdlovsk District, Northern Urals, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Sicklerite: Li(Mn++,Fe+++)PO4 Lithiophilite: LiMnPO4
Comments: Mottled tan-green-pink massive sicklerite with dark brown lithiophilite on quartz. Location: Custer Mountain Lode, Custer County, South Dakota, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Siderazot: Fe5N2
Comments: Bluish siderazot coatings on scoria lava rock. Location: Eruption of 1941, Vesuvius, Campania, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Siderite: Fe++CO3
Comments: Bladed siderite crystal groups on crystallized quartz matrix. Location: Peyrebrune, Tarn, France. Scale: 8.7 x 6.5 x 4.7 cm. © Fabre Minerals
Comments: Blocky siderite crystals on quartz. Location: Panasqueira (2nd level), in the region of Beira Baixa, Portugal. Scale: 7 x 8 cm. © Fabre Minerals
Siderite: Fe++CO3 Garronite: Na2Ca5Al12Si20O64·27(H2O)
Comments: Translucent white micro crystals of garronite on brown siderite crystals. Location: Mont Saint Hilaire, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Siderite: Fe++CO3 Arsenopyrite: FeAsS
Comments: White, metallic arsenopyrite and tan siderite crystals. Location: Panasqueira (2000, 3rd level), in the region of Beira Baixa, Portugal. Scale: 11 x 7 cm. © Fabre Minerals
Sideronatrite: Na2Fe+++(SO4)2(OH)·3(H2O)
Comments: Golden yellow acicular sprays of sideronatrite crystals on matrix. Location: Sulfur pit, Crescent Valley, Nevada, USA. Scale: 6 x 5 x 4 cm. © John Veevaert
Siderophyllite: KFe++2Al(Al2Si2)O10(F,OH)2
Comments: Micaceous siderophyllite with quartz. Location: Karaoba, Aktjubinsk, Kazakhstan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species