Thomas Witzke's Image Gallery

Carnallite: KMgCl3·6(H2O)  
Rinneite: K3NaFe++Cl6

Comments: Orange to light brown rinneite with colorless carnallite.
Location: Merkers, Bad Salzungen, Rhön, Thuringia, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Cattiite: Mg3(PO4)2·22(H2O)

Comments: Colorless cattiite grain fragment.
Location: Zheleznyi Fe Mine, Kovdor Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Grain size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Cechite: Pb(Fe++,Mn)(VO4)(OH)

Comments: Black tabular crystal of cechite on matrix.
Location: Alexander Gallery, Vrancice, Príbram, Stredoceský Kraj, Bohemia, Czech Republic. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Cerianite-(Ce): (Ce++++,Th)O2

Comments: Black crystal of cerianite-(Ce) on matrix.
Location: Ettringer Bellerberg, Ettringen, near Mayen, Eifel Mts, Rhineland-Palatinate, Germany. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Cervantite: Sb+++Sb+++++O4

Comments: Brownish-yellow, rounded crystalline aggregate of cervantite on quartz.
Location: Clara Mine, Oberwolfach, Wolfach Valley, Black Forest, Baden-Württemberg, Germany. Scale: Picture size 1.6 mm.
© Thomas Witzke / Abraxas-Verlag

Cetineite: (K,Na)3+x(Sb2O3)3(Sb2S3)(OH)x·(2.8-x)(H2O)  
Valentinite: Sb2O3

Comments: Orange-reddish acicular crystals of cetineite with white valentinite.
Location: Cetine di Cotorniano mine (Cetine mine), Rosia, Siena, Tuscany, Italy. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Chalcanthite: CuSO4·5(H2O)  
Chalcocyanite: CuSO4

Comments: White to pale bluish chalcocyanite with darker bluish chalcanthite. The mineral is hygroscopic and must be stored in a closed box.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Chalcanthite: CuSO4·5(H2O)  
Dolerophanite: Cu2(SO4)O  
Fedotovite: K2Cu++3(SO4)3O

Comments: Brown crystals of dolerophanite with blue chalcanthite and green fedotovite.
Location: Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Chalcanthite: CuSO4·5(H2O)  
Fedotovite: K2Cu++3(SO4)3O

Comments: Green fedotovite with pale blue chalcanthite.
Location: Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Chalcocyanite: CuSO4  
Chalcanthite: CuSO4·5(H2O)

Comments: White to pale bluish chalcocyanite with darker bluish chalcanthite. The mineral is hygroscopic and must be stored in a closed box.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Chalcomenite: CuSeO3·2(H2O)

Comments: Blue crystals of chalcomenite on matrix.
Location: El Dragón mine, Quijarro province, Potosí, Bolivia. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Chalcopyrite: CuFeS2  
Moncheite: (Pt,Pd)(Te,Bi)2

Comments: White moncheite with chalcopyrite (orange, blue and violet tarnishing colors) in silicate matrix. 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 0.11 mm.
© Thomas Witzke / Abraxas-Verlag

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

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

Chapmanite: Sb+++Fe+++2(SiO4)2(OH)

Comments: Green, earthy chapmanite on quartz-sulfide matrix.
Location: Neue Hoffnung Gottes Mine, Bräunsdorf, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Charoite: K5Ca8(Si6O15)2(Si2O7)Si4O9(OH)·3(H2O)

Comments: Polished slab of purple charoite.
Location: Murun Massif, Chara River, Davan, Torgo River Basin, Aldan Shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia. Scale: Picture size 6.5 cm.
© Thomas Witzke / Abraxas-Verlag

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

Chernikovite: (H3O)2(UO2)2(PO4)2·6(H2O)

Comments: Greenish-yellow crystals of chernikovite intimately intergrown with meta-autunite.
Location: Rockelmann Quarry, Schwarzenberg, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture Size 3.5 mm.
© Thomas Witzke / Abraxas-Verlag

Chloritoid: (Fe++,Mg,Mn)2Al4Si2O10(OH)4  
Paragonite: NaAl2(Si3Al)O10(OH)2

Comments: Grayish crystalline inclusion of chloritoid in white, massive paragonite.
Location: Drandorf Fundgrube Mine, Bockau, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Chromferide: Fe3Cr1-x (x=0,6)

Comments: Irregular nugget of chromferide.
Location: Verchnevinsk, Ural, Russia. Scale: Nugget Size 1.5 mm.
© Thomas Witzke

Chromium: Cr

Comments: Small silvery-gray metallic grain of native chromium.
Location: Sichuan, China. Scale: Grain size 0.7 mm.
© Thomas Witzke / Abraxas-Verlag