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Barroisite: [ ](CaNa)Mg3AlFe+++Si7AlO22(OH)2
Comments: Black, acicular, compact, massive barroisite. Location: Monte Beigua, Savona, Liguria, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Barytocalcite: BaCa(CO3)2
Comments: Pale pink crystalline barytocalcite in dark matrix. Location: Langban, Varmland, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Barytolamprophyllite: Ba2Na3(Fe+++,Ti)3(Si2O7)2(O,OH,F)4 Lamprophyllite: Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2
Comments: Brownish-yellow barytolamprophyllite on dark green lamprophyllite. Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bayleyite: Mg2(UO2)(CO3)3·18(H2O)
Comments: Bright yellow coatings of bayleyite. Location: Near Moab, Grand County, Utah, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Beaverite: PbCu++(Fe+++,Al)2(SO4)2(OH)6
Comments: Yellow earthy coating of beaverite. Location: Hornsilver Mine, Frisco, Beaver County, Utah, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bederite: ([ ],Na)Ca2(Mn++,Mg,Fe++)2(Fe+++,Mg++,Al)2Mn++2(PO4)6·2(H2O)
Comments: Dark brown massive bederite. Location: El Penon Pegmatite, Nevados de Palermo, Salta, Argentina. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Beidellite: Na0.5Al2(Si3.5Al0.5)O10(OH)2·n(H2O)
Comments: Pure white chalky massive beidellite. Location: From near Charlestown, Nevis, Saint Kitts and Nevis, West Indies. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bellidoite: Cu2Se Berzelianite: Cu2Se
Comments: Dark bellidoite inclusions in black berzelianite with white calcite. Location: Habri, near Tisnov, Jihomoravsky, Czech Republi. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Belyankinite: Ca1-2(Ti,Zr,Nb)5O12·9(H2O) (?)
Comments: Thin beige coating of belyankinite. Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bementite: Mn8Si6O15(OH)10
Comments: Brown massive bementite. Location: Olympic Mountains, Washington, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species