's Image Gallery

Shortite: Na2Ca2(CO3)3

Comments: Triangular shortite crystal in kerogenaceous dolomitic marlstone from the saline zone in the Green River Formation.
Location: Green River, Sweetwater Co., Wyoming, USA. Scale: Crystal Size 2 mm.
© Tom Loomis / Dakota Matrix

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  
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

Siderite: Fe++CO3

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

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

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

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

Siderotil: Fe++SO4·5(H2O)

Comments: Siderotil pseudomorphs after melanterite.
Location: 2700' level, Campbell Shaft, Bisbee, Cochise County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Sidorenkite: Na3Mn(PO4)(CO3)

Comments: Dark brown sidorenkite masses in syenite rock.
Location: Mont Saint Hilaire, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Sidwillite: MoO3·2(H2O)

Comments: Thin olive-green sidwillite coatings on quartz crystals.
Location: Lake Como, Summit County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Siegenite: (Ni,Co)3S4

Comments: Equant, dark gray, metallic crystals of siegenite on matrix.
Location: LaMotte mine, Fredericktown, Madison County, Missouri, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Siegenite: (Ni,Co)3S4  
Cattierite: CoS2

Comments: Pinkish metallic cattierite, intergrown with gray siegenite.
Location: Shinkolobwe, Katanga, Shaba, Zaire. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Sieleckiite: Cu3Al4(PO4)2(OH)12·2(H2O)

Comments: SEM image showing a hemisphere of sieleckiite on variscite crystals. (MinMag, 52:515).
Location: Mt Oxide Copper Mine, 150 km north of Mt Isa, Queensland, Australia. Scale: Sphere Diameter 0.4 mm.
© Mineralogical Magazine

Sigloite: Fe+++Al2(PO4)2(OH)3·5(H2O)  
Vauxite: Fe++Al2(PO4)2(OH)2·6(H2O)

Comments: Lime green, crystalline aggregate of sigloite on massive, blue vauxite.
Location: Llallagua, Potosi Department, Bolivia. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Silhydrite: 3SiO2·(H2O)

Comments: Fine grained massive silhydrite.
Location: Near Rome, Oregon, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Silicon: Si  
Moissanite: SiC

Comments: Backscattered electron image of metallic inclusion in moissanite (SiC). The gray shading in the BSE mage consists mainly of pure silicon (Si metal). The brighter areas are composed of Fe-silicide. (AmMin, 88:1818).
Location: Found in a cobble at a beach along the Turkish coast of the Mediterranean Sea, around 150 km NW from Izmir, and is most likely derived from Tertiary volcanic rocks outcropping in the area. Scale: Scalebar 200 µ-m.
© American Mineralogist