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Boulangerite: Pb5Sb4S11
Comments: Specimen of sulfide rich matrix with a surface coated with hair-like crystals of boulangerite. Location: Noche Buena Mine, Zacatecas, Mexico. Scale: 9 x 6.5 cm. © John Veevaert
Bournonite: PbCuSbS3
Comments: Bright, blocky crystalline aggregate of steel gray bournonite crystals. Location: Yao-gan-xian mine, Hunan China. Scale: Picture size 2 cm. © Fabre Minerals
Comments: Lustrous, silvery crystals of bournonite on massive bournonite. Location: Mercedes Mine, Huanuco Dept., Peru. Scale: 3x3x2.7 cm. © Isaias Casanova / IC Minerals
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
Bowieite: (Rh,Ir,Pt)1.77S3
Comments: Epoxy grain mount of polished gray metallic grains or bowieite. Location: Novoseltsi, Burgas Oblast (Bourgas Oblast), Bulgaria. Scale: See Image. © Rruff Database
Boyleite: (Zn,Mg)SO4·4(H2O)
Comments: Powdery white crust of boyleite on pyrite. Location: Kotzebue, Alaska, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Brabantite: CaTh(PO4)2
Comments: Altering micro grain of brabantite. Location: Kuttakuzhi, near Trivandrum, Travancore, Kerala, India. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Brackebuschite: Pb2(Mn,Fe++)(VO4)2(OH) Krettnichite: PbMn+++2(VO4)2(OH)2
Comments: Scanning electron microscope image of a prismatic krettnichite (kr) aggregate associated with manganite (ma) and barian brackebuschite (br) in a vug. The inset is a close-up illustrating the morphology of brackebuschite. (Eur. J. Mineral, 13:146). Location: hydrothermal manganite-quartz vein at the historic manganese deposit of Krettnich, Saarland, Germany. Scale: See Image. © Eur. J. Mineral
Bradaczekite: NaCu4(AsO4)3
Comments: SEM image of the aggregates of bradaczekite crystals. (CanMin, v39 , p 1116). Location: North Breach of the Great fissure Tolbachik eruption (GFTE) in 1975-1976, Kamchatka Peninsula, Russia. Scale: Magnification: ~ 600x. © Canadian Mineralogist
Bradleyite: Na3Mg(PO4)(CO3) Loughlinite: Na2Mg3Si6O16·8(H2O)
Comments: Silky fibrous veinlets of loughlinite with bradleyite. Location: Green River area, Sweetwater County, Wyoming, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species