Thomas Witzke's Image Gallery

Bazhenovite: CaS5·CaS2O3·6Ca(OH)2·20(H2O)

Comments: Yellow, bladed crystals of bazhenovite on matrix.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Bazzite: Be3(Sc,Al)2Si6O18

Comments: Blue crystals of bazzite.
Location: Thiemendorf near Königshain, Lausitz, Sachsen, Germany. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Behierite: (Ta,Nb)BO4

Comments: A light brownish crystal of behierite in matrix.
Location: Manjaka, Sahatany Valley, Antsirabe Region, Madagascar. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Belendorffite: Cu7Hg6

Comments: Small grains of belendorffite from concentrates.
Location: Moschellandsberg, Pfalz, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Bellbergite: (K,Ba,Sr)2Sr2Ca2(Ca,Na)4Al18Si18O72·30(H2O)

Comments: Small colorless to white hexagonal crystals of bellbergite on matrix.
Location: Ettringer Bellerberg, Ettringen, near Mayen, Eifel Mts, Rhineland-Palatinate, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Bellingerite: Cu++3(IO3)6·2(H2O)

Comments: Green crystal of bellingerite on matrix.
Location: Chuquicamata, Antofagasta, Chile. Scale: Picture size 8 mm.
© Thomas Witzke / Abraxas-Verlag

Betpakdalite: [Mg(H2O)6]Ca2(H2O)13[Mo++++++8As+++++2Fe+++3O36(OH)]·4(H2O)

Comments: Yellow crust of betpakdalite on quartzite.
Location: Sadisdorf, Erzgebirge, Sachsen, Germany. Scale: 10 x 6 cm.
© Thomas Witzke / Abraxas-Verlag

Beusite: (Mn++,Fe++,Ca,Mg)3(PO4)2

Comments: Massive pale pinkish-beige beusite with blue vivianite.
Location: Remmelberg, Oberpfalz, Bavaria, Germany. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Biehlite: (Sb,As)2MoO6

Comments: White fibrous crystals of biehlite.
Location: Tsumeb, Namibia. Scale: Picture size 8 mm.
© Thomas Witzke / Abraxas-Verlag

Bindheimite: Pb2Sb2O6(O,OH)

Comments: Yellow earthy bindheimite covering red, massive crocoite.
Location: Callenberg North (no. 1) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Birnessite: (Na,Ca,K)x(Mn++++,Mn+++)2O4·1.5(H2O)

Comments: Gray birnessite. Very small crystals on massive material.
Location: Das Aufgeklärte Glück Mine, Hasserode, Wernigerode, Harz Mts, Saxony-Anhalt, Germany. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Bischofite: MgCl2·6(H2O)

Comments: Colorless grains of bischofite. The mineral is very hygroscopic and must be stored in a closed vial.
Location: Stassfurt, Stassfurt Deposit, Saxony-Anhalt, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Bismutocolumbite: Bi(Nb,Ta)O4

Comments: Black crystals of bismutocolumbite.
Location: Malkhan, Krasny Chikoy, Transbaikalia, Siberia. Scale: Picture Size 5 mm.
© Thomas Witzke

Bismutoferrite: BiFe+++2(SiO4)2(OH)

Comments: Yellow-greenish, earthy bismutoferrite.
Location: Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Specimen size 8.5 cm.
© Thomas Witzke / Abraxas-Verlag

Bismutomicrolite: (Bi,Ca)(Ta,Nb)2O6(OH)

Comments: A dark crystal of bismutomicrolite in pearly muscovite.
Location: Malkhan Range, Krasny Chikoy, Chitinskaya Oblast', Transbaikalia, Eastern-Siberian Region, Russia. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Blodite: Na2Mg(SO4)2·4(H2O)  
Tamarugite: NaAl(SO4)2·6(H2O)

Comments: Clear, yellow blödite with white tamarugite.
Location: Willi Agatz Mine, Dresden, Saxony, Germany. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Boracite: Mg3B7O13Cl

Comments: A greenish crystal of boracite, a tetrahedron modified by cube and dodecahedral faces.
Location: Bernburg, Sachsen-Anhalt, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

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

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

Boussingaultite: (NH4)2Mg(SO4)2·6(H2O)

Comments: White, crystalline aggregates boussingaultite.
Location: Anna Mine, Alsdorf, Aachen, North Rhine-Westphalia, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Brannerite: (U,Ca,Ce)(Ti,Fe)2O6

Comments: Black grains of brannerite with gold and other minerals.
Location: Witwatersrand field, South Africa. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag