Thomas Witzke's Image Gallery

Comancheite: Hg13(Cl,Br)8O9

Comments: Small orange crystals of comancheite on matrix.
Location: Mariposa mine, Terlingua, Terlingua district, Brewster County, Texas, USA. Scale: Picture size 1.4 mm.
© Thomas Witzke / Abraxas-Verlag

Compreignacite: K2(UO2)6O4(OH)6·8(H2O)

Comments: Yellow crystals of compreignacite on matrix.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Cooperite: (Pt,Pd,Ni)S  
Cherepanovite: RhAs  
Platinum: Pt

Comments: Creamy-grayish fractured grains of cherepanovite with gray granular cooperite and white massive grains of iridian ruthenian platinum. Polished section in reflected light.
Location: Placer Deposit, Northern Pekul'nei River, Pekul'nei Range, Chukotka (Tchukotka) Okrug, Chukot Peninsula, Far-Eastern Region, Russia. Scale: Picture size 0.12 mm.
© Thomas Witzke / Abraxas-Verlag

Coquandite: Sb6O8(SO4)·(H2O)

Comments: Silky coquandite with stibnite.
Location: Pereta mine, Grosseto, Tuscany, Italy. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Corderoite: Hg3S2Cl2

Comments: Small dark brown dodecahedral crystal of corderoite.
Location: Hohe Buche, Königsberg, Wolfstein, Palatinate, Rhineland-Palatinate, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Cordylite-(Ce): Ba(Ce,La)2(CO3)3F2  
Synchysite-(Ce): CaCe(CO3)2F

Comments: Yellow crystals of cordylite-(Ce) on light brownish synchysite-(Ce).
Location: Narssârssuk (Narsarsuk), Igaliko, Greenland. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Coronadite: Pb(Mn++++,Mn++)8O16  
Crocoite: PbCrO4

Comments: Black coronadite with red crocoite on matrix.
Location: Callenberg North (no. 1) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Specimen size 7 cm.
© Thomas Witzke / Abraxas-Verlag

Corundum: Al2O3  
Zincohogbomite-2N2S: (Zn,Fe++)(2-2x)(Ti)xAl4O8

Comments: Thin-Section (Plane Polarized Light) of a brown, twinned zincohögbomite-2N2S crystal with blue corundum.
Location: Mikro-Lakka Emery deposit, Kerketeas Mt, Sámos Island, Aegean Islands Department, Greece. Scale: Picture size 1.1 mm.
© Thomas Witzke / Abraxas-Verlag

Cosalite: Pb2Bi2S5

Comments: Metallic-lustered cosalite on matrix.
Location: Limestone Quarry, Hammerunterwiesenthal, Oberwiesenthal, Erzgebirge, Saxony, Germany. Scale: Picture size 8 mm.
© Thomas Witzke / Abraxas-Verlag

Covellite: CuS  
Nukundamite: (Cu,Fe)4S4

Comments: Metallic brownish rim of nukundamite with dark purplish-blue covellite on fine-grained pyrite.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Crichtonite: (Sr,La,Ce,Y)(Ti,Fe+++,Mn)21O38

Comments: Black crichtonite crystal in quartz.
Location: Kriegalptal, Binntal, Wallis (Valais), Switzerland. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Crocoite: PbCrO4  
Vauquelinite: Pb2Cu(CrO4)(PO4)(OH)

Comments: Olive-greenish vauquelinite encrusting red crocoite.
Location: Callenberg North (no. 1) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Crocoite: PbCrO4  
Coronadite: Pb(Mn++++,Mn++)8O16

Comments: Black coronadite with red crocoite on matrix.
Location: Callenberg North (no. 1) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Specimen size 7 cm.
© Thomas Witzke / Abraxas-Verlag

Cronusite: Ca0.2(H2O)2CrS2

Comments: Light gray grain of cronusite. Polished section (from microprobe analysis) in reflected light.
Location: Enstatite meteorite, Norton Co., Kansas, USA. Scale: Picture size 0.18 mm.
© Thomas Witzke / Abraxas-Verlag

Cryptohalite: (NH4)2SiF6

Comments: White to colorless crystals of cryptohalite. The red color is due to admixtured (amorphous ?) selenium.
Location: Kladno, Stredoceský Kraj, Bohemia, Czech Republic. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Cubanite: CuFe2S3  
Plumbopalladinite: Pd3Pb2  
Valleriite: 4(Fe,Cu)S·3(Mg,Al)(OH)2  
Pentlandite: (Fe,Ni)9S8

Comments: Polished Section image (PPL) of plumbopalladinite (Pl) with polarite Po), surrounded by a rim of isoferroplatinum (Iso) with cubanite (Cu), pentlandite (Pe), and valleriite (Va).
Location: Majak Mine, Talnakh, Norilsk, Ural, Russia. Scale: Picture Size 0.7 mm.
© Thomas Witzke

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

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

Cyrilovite: NaFe+++3(PO4)2(OH)4·2(H2O)

Comments: Greenish-yellow crystals of cyrilovite in matrix.
Location: Rengersdorf, Görlitz, Oberlausitz, Saxony, Germany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Dashkovaite: Mg(HCOO)2·2(H2O)

Comments: White fibrous dashkovaite.
Location: Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia. Scale: Picture size 2.3 mm.
© Thomas Witzke / Abraxas-Verlag

Daubreeite: BiO(OH,Cl)

Comments: Massive yellow daubreeite.
Location: Cerro Tazna, Atocha-Quechisla district, Nor Chichas Province, Potosí Department, Bolivia. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag