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Brammallite: (Na,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,(H2O)]
Comments: Dark gray-brown fine grained massive brammallite. Location: Near Ione, Amador County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Brandtite: Ca2(Mn,Mg)(AsO4)2·2(H2O)
Comments: Clear, crystalline brandtite aggregates. Location: Harstig mine, Pajsberg, Varmland, Sweden. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
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
Brannockite: KSn2Li3Si12O30
Comments: Clear, hexagonal plates of brannockite crystals. Location: Foote mine, Kings Mountain, Cleveland County, North Carolina, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Brass: Cu3Zn2
Comments: Small brassy metallic grain of brass. Location: Nurek Ore District, Uzbekistan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Brassite: Mg(AsO3OH)·4(H2O)
Comments: Opaque white botryoidal masses of brassite on matrix. Location: Mine de Salsigne, Aude, France. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Braunite-I: Mn++Mn+++6SiO12 Braunite-II: 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
Braunite-I: Mn++Mn+++6SiO12 Donpeacorite: (Mn,Mg)MgSi2O6
Comments: Brown crystalline massive donpeacorite with dark brown black braunite. Location: Zinc Corporation of America Mine #4, Balmat, Saint Lawrence County, New York, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Braunite-I: Mn++Mn+++6SiO12 Macfallite: Ca2(Mn+++,Al)3(SiO4)(Si2O7)(OH)3 Johnsenite-(Ce): Na12(Ce,REE,Sr)3Ca6Mn3Zr3W(Si25O73)(CO3)(OH,Cl)2
Comments: Tiny - less than 1mm - maroon crystals of mcfallite suspended as inclusions in massive quartz along with larger spots of brown johnsenite-(Ce) and braunite. Location: Artur mine, Jaguaracu, Minas Gerais, Brazil. Scale: Overall 3 x 2.5 slab. © Tom Loomis / Dakota Matrix
Braunite-II: Mn++Mn+++6SiO12 Braunite-I: Mn++Mn+++6SiO12
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
Briartite: Cu2(Zn,Fe)GeS4 Catamarcaite: Cu6GeWS8 Bornite: Cu5FeS4
Comments: Briartite-type phase (Bri) in close association with catamarcaite (Ct) lining a cavity in massive bornite (Bn) - chalcocite (Cc) ore; Sp is sphalerite (CanMin v44:1481). Location: Bornite-rich ore from old dumps near the La Rosario vein, Capillitas epithermal deposit, Catamarca Province, Argentina.. Scale: See Image. © Canadian Mineralogist