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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