's Image Gallery

Oswaldpeetersite: (UO2)2CO3(OH)2·4(H2O)

Comments: Greenish-yellow, acicular, radial-spherical blebs of oswaldpeetersite on matrix.
Location: Jomac Mine, San Juan County, Utah, USA. Scale: Picture size 5 mm.
© Paul M. Schumacher

Otavite: CdCO3

Comments: White rhombohedra of otavite.
Location: Tsumeb mine, Tsumeb, Otavi District, Oshikoto, Namibia. Scale: See Image.
© Rruff Database

Ottensite: Na3(Sb2O3)3(SbS3)·3H2O

Comments: Red-brown crusts of ottensite on stibnite.
Location: Qinglong (Dachang) Sb-Au deposit, Qinglong Co., Qianxi'nan Autonomous Prefecture, Guizhou Province, China. Scale: Specimen size 5.2 x 3.0 x 2.9 cm.
© Rob Lavinsky

Ottrelite: (Mn,Fe++,Mg)2Al4Si2O10(OH)4

Comments: Dark green crystalline ottrelite in quartz.
Location: Vielsalm, Luxembourg, Belgium. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Otwayite: Ni2(CO3)(OH)2·(H2O)

Comments: Pale green botryoidal otwayite on serpentinite rock.
Location: Otway Prospect, Nullagin Plain, Western Australia, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Oulankaite: (Pd,Pt)5(Cu,Fe)4SnTe2S2  
Telargpalite: (Pd,Ag)3Te  
Tulameenite: Pt2FeCu  
Chalcopyrite: CuFeS2

Comments: Gray long-prismatic crystal of oulankaite with light grayish telargpalite and pale yellowish-white rims of tulameenite in massive yellowish chalcopyrite. Polished section (from microprobe analysis) in reflected light.
Location: Lukkulaisvaara ultrabasic Massif, Olanga (Oulanka) River, Oulanka plutonic complex, Karelia Republic, Northern Region, Russia. Scale: Picture size 0.12 mm.
© Thomas Witzke / Abraxas-Verlag

Oursinite: (Co,Mg)(H3O)2[(UO2)SiO4]2·3(H2O)

Comments: Yellow velvety acicular sprays of oursinite crystals on matrix.
Location: Shinkolobwe Mine (Kasolo Mine), Shinkolobwe, Central area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaire). Scale: Picture Size 8 x 6 mm.
© Sandro Maggia/Minernet.it

Ovamboite: Cu20(Fe,Cu,Zn)6W2Ge6S32

Comments: BSE image of ovamboite (ov), germanite (germ) and chalcocite (cc).
Location: Tsumeb deposit, Namibia. Scale: See Image.
© Diederik Visser

Overite: CaMgAl(PO4)2(OH)·4(H2O)

Comments: Clear, pale yellow prismatic crystals of overite deep inside a crandallite vug.
Location: Clay Canyon, Fairfield, Oquirrh Mts, Utah Co., Utah, USA. Scale: Picture Size 2.5 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Owyheeite: Pb7Ag2(Sb,Bi)8S20

Comments: Acicular owyheeite microcrystals in quartz.
Location: Lower Magnolia Mine, Morey District, Nye County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Oxammite: (NH4)2(C2O4)·(H2O)

Comments: Pale yellow translucent crystalline granular oxammite.
Location: Petrogale Cave, Western Australia, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Oxiberaunite: (Fe+++,Mn+++)Fe+++5(PO4)4O(OH)4·6(H2O)

Comments: Red-brown ball of radiating acicular oxiberaunite (eleonorite) microcrystals, on pegmatitic matrix.
Location: LCA Mine, Bessemer City, Gaston County, North Carolina, USA. Scale: Box size 3.18 cm x 3.18 cm.
© Richard Dale / Dale Minerals

Oxykinoshitalite: (Ba,K)(Mg,Fe++,Ti)3(Si,Al)4O10O2

Comments: Back-scattered-electron image of oxykinoshitalite, showing the prominent (001) cleavage, (CanMin, v43:1501).
Location: Fernando de Noronha Island, Pernambuco, Brazi. Scale: See Image.
© Canadian Mineralogist

Oyelite: Ca10B2Si8O29·12(H2O)  
Bultfonteinite: Ca2SiO2(OH,F)4

Comments: White encrustation of oyelite covering brownish botryoidal bultfonteinite.
Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 2 x 4 cm.
© John Veevaert

Oyelite: Ca10B2Si8O29·12(H2O)

Comments: Tufts of white acicular millimetric oyelite crystals on matrix.
Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: Picture size 2 cm.
© Sandro Maggia/Minernet.it

Paakkonenite: Sb2AsS2  
Kermesite: Sb2S2O

Comments: Much of the matrix is the gray metallic paakkonenite with red crystals of kermesite and minute yellow crystals of valentinite.
Location: Cai' ao mine, Danfong Co., Shaanxi Prov., China. Scale: 3x2x2cm.
© Tom Loomis / Dakota Matrix

Paakkonenite: Sb2AsS2  
Vaughanite: TlHgSb4S7  
Stibarsen: SbAs

Comments: B&W image of vaughanite (Va) aggregate surrounding a fibrous bundle of paakkonenite (Pfi) and associated with stibarsen (Star) and realgar (Re). Oil immersion. (CanMin, v53:369).
Location: Rare primary constituent of the Golden Giant orebody of the Hemlo gold deposit, Hemlo, Ontario, Canada. Scale: See Image.
© Canadian Mineralogist

Paarite: Cu1.7Pb1.7Bi6.3S12  
Krupkaite: PbCuBi3S6

Comments: A mosaic of large grains of a low-Cu bismuthinite derivative, decomposed into an intergrowth of paarite (bd42) and krupkaite (bd49).
Location: In quartz veins of the Felbertal scheelite deposit, Salzburg Province, Austria. (CanMin v43:909). Scale: See Image.
© Canadian Mineralogist

Pabstite: Ba(Sn,Ti)Si3O9

Comments: Pabstite grains in matrix. It is essentially the tin analog of benitoite with tin replacing titanium in the formula 3:1. Pabstite fluoresces under SW UV light as seen in the photo.
Location: Kalkar Quarry, Santa Cruz County, California, USA. Scale: 4.5 x 3 cm.
© John Veevaert

Pachnolite: NaCaAlF6·(H2O)

Comments: Color-zoned (darker core) prismatic translucent pachnolite crystals, with secondary white prismatic microcrystals.
Location: Ivigtut, Greenland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species