Thomas Witzke's Image Gallery

Iquiqueite: K3Na4Mg(Cr++++++O4)B24O39(OH)·12(H2O)  
Nitratine: NaNO3

Comments: Yellow iquiqueiite in clear, massive nitration.
Location: Salar de Miraje, Antofagasta, Chile. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Iriginite: (UO2)(Mo++++++2O7)·3(H2O)

Comments: Yellow aggregates of iriginite on matrix.
Location: Cameron area, Coconino County, Arizona, USA. Scale: Picture size 2.5 mm.
© Thomas Witzke / Abraxas-Verlag

Isoferroplatinum: (Pt,Pd)3(Fe,Cu)  
Cuproiridsite: CuIr2S4

Comments: Gray equant crystal of cuproiridsite in light gray isoferroplatinum. Polished section (from microprobe analysis) in reflected light.
Location: Konder Mine, Konder alkaline-ultrabasic massif, Aldan shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia. Scale: Picture size 0.14 mm.
© Thomas Witzke / Abraxas-Verlag

Isokite: CaMg(PO4)F

Comments: Pale brownish to brown isokite in quartz.
Location: Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Isomertieite: Pd11Sb2As2  
Arsenopalladinite: Pd8(As,Sb)3  
Gold: Au  
Bornite: Cu5FeS4

Comments: Light grayish grain of intimately intergrown isomertieite and arsenopalladinite (in the center of the picture), with pale yellow gold and brownish to violet bornite. Polished section (from microprobe analysis) in reflected light.
Location: Noril'sk, Putoran Mts, Taymyrskiy Autonomous Okrug, Eastern-Siberian Region, Russia. Scale: Picture size 0.1 mm.
© Thomas Witzke / Abraxas-Verlag

Isovite: (Cr,Fe)23C6

Comments: Dark gray metallic grain of isovite.
Location: Verkhneivinsk, Sverdlovskaya Oblast', Urals Region, Russia. Scale: Grain size 0.7 mm.
© Thomas Witzke / Abraxas-Verlag

Jachymovite: (UO2)8(SO4)(OH)14·13(H2O)

Comments: Yellow crystals of jáchymovite.
Location: Jáchymov (St Joachimsthal), Krusné Hory (Erzgebirge), Západoceský Kraj, Bohemia, Czech Republic. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Jarosite: KFe+++3(SO4)2(OH)6  
Alunogen: Al2(SO4)3·17(H2O)

Comments: Colorless to white, tabular crystals alunogen on reddish jarosite.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Jarosite: KFe+++3(SO4)2(OH)6  
Fairbankite: PbTe++++O3

Comments: Colorless to white crystals of fairbankite with orangish brown jarosite.
Location: Tombstone, Tombstone District, Cochise Co., Arizona, USA. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Jarosite: KFe+++3(SO4)2(OH)6  
Winstanleyite: TiTe++++3O8

Comments: Small, yellow octahedral crystal of winstanleyite on brownish red jarosite.
Location: Tombstone, Tombstone District, Cochise Co., Arizona, USA. Scale: Picture size 0.9 mm.
© Thomas Witzke / Abraxas-Verlag

Jensenite: Cu++3Te++++++O6·2(H2O)

Comments: Small green crystals of jensenite in matrix.
Location: Centennial Eureka Mine, Tintic District, Juab Co., Utah, USA. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Jeromite: As(S,Se)2

Comments: Orange, powdery jeromite on matrix.
Location: Salar de Surire, Tarapaca, Chile. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Johnsomervilleite: Na2Ca(Mg,Fe++,Mn)7(PO4)6

Comments: Dark brownish johnsomervilleite.
Location: Sapucaia Mine, Conselheiro Pena district, Galiléia, Governador Valadares, Rio Doce, Minas Gerais, Southeast Region, Brazil. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Jordisite: MoS2

Comments: Black earthy jordisite on matrix.
Location: Glückauf Shaft, Himmelsfürst Mine, Brand-Erbisdorf, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Juonniite: CaMgSc(PO4)2(OH)·4(H2O)

Comments: Brownish grain of juonniite on matrix.
Location: Kovdor Mine, Kovdor massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Kaatialaite: Fe+++[H2As+++++O4]3·5-5.5(H2O)

Comments: White kaatialaite with arsenolite on native arsenic.
Location: Shaft 371, Schlema-Hartenstein area, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Kamacite: alpha-(Fe,Ni)  
Carlsbergite: CrN

Comments: Polished section showing a small light gray elongated inclusion of carlsbergite in massive kamacite.
Location: Kenton County meteorite, Kenton Co., Kentucky, USA. Scale: Picture size 0.08 mm.
© Thomas Witzke / Abraxas-Verlag

Kamacite: alpha-(Fe,Ni)  
Nickelphosphide: (Ni,Fe)3P

Comments: Small inclusion of nickelphosphide in massive kamacite.
Location: Kenton County meteorite, Kenton Co., Kentucky, USA. Scale: Picture size 0.09 mm.
© Thomas Witzke / Abraxas-Verlag

Kambaldaite: NaNi4(CO3)3(OH)3·3(H2O)

Comments: Light green kambaldaite blebs and crusts.
Location: Kambalda Nickel deposit, Kambalda, WA, Australia. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Kampfite: Ba12(Si11Al5)O31(CO3)8Cl5

Comments: Light, bluish-gray crystalline kampfite.
Location: Esquire #1 Claim, Rush Creek, Fresno Co., California, USA. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag