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Bentorite: Ca6(Cr,Al)2(SO4)3(OH)12·26(H2O)
Comments: Violet crystalline bentorite. Location: Hatrurim Area, West of Dead Sea, Israel. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Berborite: Be2(BO3)(OH,F)·(H2O)
Comments: Colorless, nearly transparent crystalline berborite in matrix. Location: Saga Quarry, Tvedalen, Vestfold, Norway. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bergslagite: CaBe(AsO4)(OH)
Comments: White (fluorescent) veinlet of bergslagite cutting through metallic, gray hematite. Location: Langban Mine Dump, Langban, Varmland, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Berlinite: AlPO4 Trolleite: Al4(PO4)3(OH)3
Comments: Pinkish crystalline berlinite with blue trolleite. Location: Ijzer Mine, Vestana, Christiansted, Varmland, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Berlinite: AlPO4 Lacroixite: NaAl(PO4)F
Comments: Pale olive green crystalline lacroixite with white crystalline berlinite. Location: Rusororo Pegmatite, Gatumba, Gisenyi, Rwanda. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Berndtite: SnS2 Tschermigite: (NH4)Al(SO4)2·12(H2O)
Comments: Yellow crystalline berndtite on tschermigite. Location: Shamokin, Northumberland County, Pennsylvania, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Berryite: Cu3Ag2Pb3Bi7S16 Aikinite: PbCuBiS3
Comments: Fine-grained, gray, metallic granular berryite with silvery, metallic, prismatic aikinite. Location: Mike Mine, San Juan County, Colorado. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Berthierine: (Fe++,Fe+++,Al,Mg)2-3(Si,Al)2O5(OH)4
Comments: Berthierine-1M, black pseudomorphs after cordylite-(Ce) crystals. Location: Mont Saint Hilaire, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Berthierite: FeSb2S4
Comments: Prismatic crystals of berthierite, tarnished bronze metallic, with stibnite and quartz crystals. Location: San Martin Mine, Zacatecas, Mexico. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bertossaite: Li2CaAl4(PO4)4(OH)4
Comments: Pale pinkish crystalline bertossaite with yellowish apatite and blue lazulite. Location: Buranga Pegmatite, near Gatumba, Gisenyi, Rwanda. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Berzelianite: Cu2Se Athabascaite: Cu5Se4 Umangite: Cu3Se2
Comments: Reflected light photomicrograph of umangite (pinkish), berzelianite (gray), athabascaite (small white areas in berzelianite), calcite (olive). Location: Sierra de Umango, La Rioja, Argentin. Scale: Not Given. © Jeff Weissman / Photographic Guide to Mineral Species
Berzelianite: Cu2Se Bellidoite: 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
Berzelianite: Cu2Se
Comments: Blue-black metallic massive berzelianite. Location: Bukov, Western Moravia, Severocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Berzelianite: Cu2Se Novakite: (Cu,Ag)21As10
Comments: Gray metallic dendritic novakite in white calcite with tarnished black berzelianite. Location: Cerny Dul, Bohemia, Vychodocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Berzelianite: Cu2Se Umangite: Cu3Se2
Comments: Black massive umangite intergrown with dark blue metallic berzelianite. Location: Borsov, Bohemia, Vychodocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Beyerite: (Ca,Pb)Bi2(CO3)2O2
Comments: Greenish yellow crusts of beyerite on pegmatite. Location: Harding Mine, Taos County, New Mexico, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bianchite: (Zn,Fe++)(SO4)·6(H2O)
Comments: White powdery crust of bianchite on clear to white gypsum. Location: Glomsrudhollen, Amot, Modum, Buskerud, Norway. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bieberite: CoSO4·7(H2O)
Comments: Pink crust of bieberite with dark blue chalcanthite. Location: Katanga, Shaba, Zaire. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bilinite: Fe++Fe+++2(SO4)4·22(H2O)
Comments: Powdery crust of white bilinite on pyrite. Location: Bisbee, Cochise County, Arizona, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Biotite: K(Mg,Fe++)3[AlSi3O10(OH,F)2 Anthophyllite: [ ]Mg7Si8O22(OH)2
Comments: Fibrous mass of anthophyllite as a shell around biotite. Location: Hermanov, Severocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species