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Bromellite: BeO
Comments: Nearly colorless translucent crystalline bromellite in chloritic schistose rock. Location: Pitkyaranta, Republic of Karelia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Brownmillerite: Ca2(Al,Fe+++)2O5
Comments: Brownish-orange masses of brownmillerite in skarn. Location: Bellerberg, Ettringen, Eifel Mountains, Rheinland-Pfalz, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Brownmillerite: Ca2(Al,Fe+++)2O5 Reinhardbraunsite: Ca5(SiO4)2(OH,F)2
Comments: Pink crystalline reinhardbraunsite in brownmillerite. Location: Near Bellerberg, Eifel, Rheinland-Pflaz, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Brugnatellite: Mg6Fe+++(CO3)(OH)13·4(H2O)
Comments: Botryoidal brugnatellite. Location: Monte Ramazzo, Liguria, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Brushite: CaHPO4·2(H2O)
Comments: Tan coatings of brushite on calcite. Location: Oberschleme, Erzgebirge Mountains, Sachsen, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Buddingtonite: (NH4)AlSi3O8·0.5(H2O)
Comments: Chalky massive buddingtonite. Location: Sharon Heights, Menlo Park, San Mateo County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bukovite: Tl2Cu3FeSe4
Comments: Silvery metallic minute aggregates of bukovite in white calcite (polished mount). Location: Predborice, Stredocesky, Czech Republic. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Burbankite: (Na,Ca)3(Sr,Ba,Ce)3(CO3)5
Comments: Yellow massive burbankite. Location: Big Sandy Creek, near Rocky Boy, Big Bear Paw Mountains, Hill County, Montana, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Burckhardtite: Pb2(Fe+++,Mn+++)Te++++(AlSi3O10)O2(OH)2·(H2O) Moctezumite: Pb(UO2)(TeO3)2
Comments: Pink crusts of burckhardtite with yellow crystalline moctezumite on quartz. Location: Moctezuma Mine, Moctezuma, Sonora, Mexico. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Burkeite: Na6(CO3)(SO4)2
Comments: Translucent to opaque vuggy mass of burkeite. Location: Searles Lake, San Bernardino County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Burpalite: Na2CaZrSi2O7F2
Comments: Yellow crystalline grains of burpalite. Location: Burpala, Transbaikal, Republic of Buryatia, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Butschliite: K2Ca(CO3)2
Comments: Slightly fibrous to granular massive butschliite. Location: Near Shavings Lake, Renfrew County, Ontario, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bystromite: MgSb2O6
Comments: Dark brown bystromite in quartz. Location: La Fortuna Mine, El Antimonio, Aqua Prieta, Sonora, Mexico. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bytownite: (Ca,Na)(Si,Al)4O8 Plagioclase: (Na,Ca)(Si,Al)4O8
Comments: Translucent crystalline bytownite. Location: Crystal Bay, Hennepin County, Minnesota, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cadmoselite: CdSe
Comments: Black cadmoselite grains in quartz. Location: Republic of Tuva, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cadwaladerite: Al(OH)2Cl·4(H2O)
Comments: Yellow crystalline grain of cadwaladerite, somewhat deliquescent. Location: Cerro Pintados, south east of Iquique, Tarapaca, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Cafetite: Ca(Fe,Al)2Ti4O12·4(H2O)
Comments: Ocher-colored aggregates of cafetite in pegmatite, intimately mixed with iron hydroxides. Location: Mount Rasvumchorr, Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Calciborite: CaB2O4
Comments: Translucent colorless crystalline calciborite. Location: Novofrolovskoye, Sverdlovsk District, Northern Urals, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Calcioburbankite: Na3(Ca,REE,Sr)3(CO3)5 Aegirine: NaFe+++Si2O6
Comments: Tan crystal spray of calcioburbankite on dark green aegirine. Location: Mont Saint Hilaire, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Calciocopiapite: CaFe+++4(SO4)6(OH)2·19(H2O)
Comments: Greenish yellow crystalline crust of calciocopiapite. Location: Borate, San Bernardino County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species