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Braunite-II: Mn++Mn+++6SiO12 Braunite-I: Mn++Mn+++6SiO12
Comments: Crystals of braunite. Location: Black Rock Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: Crystal size 1.3 cm. © John Veevaert
Bravoite: (Fe,Ni,Co)S2
Comments: Steel gray, metallic crystal of bravoite on brassy yellow chalcopyrite. Location: Gey, Rhineland-Palatinate, Germany. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Brazilianite: NaAl3(PO4)2(OH)4
Comments: Gemmy brazilianite crystal. Location: Marcel Telirio mine, Divino das Laranjeiras, Minas Gerais, Brazil. Scale: Size Not Given. © Fabre Minerals
Bredigite: Ca7Mg(SiO4)4 Spurrite: Ca5(SiO4)2(CO3)
Comments: White veins of bredigite in massive gray spurrite (slabbed specimen). Location: Camphouse, Ardnamurchan, Argyll, Highland, Scotland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Breithauptite: NiSb
Comments: Three brownish, metallic hexagonal prisms of breithauptite in calcite. Location: Sarrabus, Sardinia, Italy. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Brendelite: (Bi,Pb)2Fe(PO4)(O,OH)3
Comments: Small brown tabular crystals of brendelite on matrix. Location: Güldener Falk Mine, Schneeberg, Erzgebirge, Sachsen, Germany. Scale: Picture size 1 mm. © Thomas Witzke / Abraxas-Verlag
Brenkite: Ca2(CO3)F2
Comments: Spherical aggregate of colorless crystals of brenkite. Location: Schellkopf, Brenk, Eifel Mts, Rhineland-Palatinate, Germany. Scale: Picture size 7.5 mm. © Thomas Witzke / Abraxas-Verlag
Brewsterite-Ba: (Ba,Sr)Al2Si6O16·5(H2O)
Comments: Colorless to off-white striated prismatic brewsterite-Ba crystals. Location: Strontian, North West Highlands (Argyllshire), Scotland, UK. Scale: See Image. © Rruff Database
Brewsterite-Sr: (Sr,Ba)Al4Si12O32·10(H2O)
Comments: Translucent brewsterite crystals on matrix. Location: Yellow Lake, Olalla, Osoyoos Mining Division, British Columbia, Canada. Scale: 35x30x20 mm. © John Betts - Fine Minerals
Brianyoungite: Zn3(CO3,SO4)(OH)4
Comments: Silky white aggregates of brianyoungite with small yellow crystals of sulfur on sphalerite. Location: St Johannes Mine, Wolkenstein, Erzgebirge, Saxony, Germany. Scale: Picture size 3 mm. © Thomas Witzke / Abraxas-Verlag