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Belkovite: Ba3(Nb,Ti)6(Si2O7)2O12
Comments: Brown hypidiomorphic granular grains of belkovite in tonalite. Location: Seblyavr Massif, Kola, Russia. Scale: Not Give - 2 cm?. © Diederik Visser
Bellbergite: (K,Ba,Sr)2Sr2Ca2(Ca,Na)4Al18Si18O72·30(H2O)
Comments: Small colorless to white hexagonal crystals of bellbergite on matrix. Location: Ettringer Bellerberg, Ettringen, near Mayen, Eifel Mts, Rhineland-Palatinate, Germany. Scale: Picture size 1 mm. © Thomas Witzke / Abraxas-Verlag
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
Bellingerite: Cu++3(IO3)6·2(H2O)
Comments: Green crystal of bellingerite on matrix. Location: Chuquicamata, Antofagasta, Chile. Scale: Picture size 8 mm. © Thomas Witzke / Abraxas-Verlag
Belovite-(Ce): (Sr,Ce,Na,Ca)5(PO4)3(OH)
Comments: Light yellow vitreous crystals of belovite-Ce up to 2 mm. Location: Malyi Punkaruaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: 2.5x3 cm. © John Veevaert
Belovite-(La): (Sr,La,Ce,Ca)5(PO4)3(F,OH)
Comments: Yellow, pseudo-hexagonal crystal of belovite-(La) in calcite. Location: Khibina massif, Kola Peninsula, Russia. Scale: Crystal size 1.5 mm. © Tom Loomis / Dakota Matrix
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
Benavidesite: Pb4(Mn,Fe)Sb6S14
Comments: Gray tabular benavidesite crystals associated with quartz. Location: Bear Basin Mines, Bear Basin, North Bend, King County, Washington, USA. Scale: See Image. © Rruff Database
Benitoite: BaTiSi3O9
Comments: Benitoite crystals in a natrolite and crossite matrix. Location: Benitoite Gem Mine, San Benito Co., California, USA. Scale: Crystal size 1.5 cm. © John Veevaert
Benjaminite: (Ag,Cu)3(Bi,Pb)7S12 Krupkaite: PbCuBi3S6 Friedrichite: Pb5Cu5Bi7S18
Comments: Crystals of a mixture of friedrichite, krupkaite, and benjaminite, with quartz crystals. Location: Estela Mine, Julcani District, Junin, Peru. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Benleonardite: Ag8(Sb,As)Te2S3
Comments: Gray-black benleonardite on hessite. Location: Moctezuma, Sonora, Mexico. Scale: Specimen Size 2x3 cm. © Diederik Visser
Comments: B&W polished section image of a bladed and an irregular mass of benleonardite (b) intergrown with hessite (h). (MinMag, v60:403). Location: Gies and Mayflower epithermal gold-silver telluride deposits, Montana, USA. Scale: See Image. © Mineralogical Magazine
Benstonite: (Ba,Sr)6(Ca,Mn)6Mg(CO3)13
Comments: Light pink benstonite crystals epitaxially formed on calcite needles. Location: Minerva #1 Mine, Hardin County, Illinois, USA. Scale: 13 x 11 mm. © John Veevaert
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
Benyacarite: (H2O,K)2Ti(Mn++,Fe++)2(Fe+++,Ti)2Ti(PO4)4(O,F)2·14(H2O)
Comments: Clear, transparent, pseudo-cubic benyacarite crystals on matrix. Location: Folgosinho Quarry, Folgosinho, Gouveia, Guarda District, Portugal. Scale: Specimen Size 4 x 3 cm. © Sergio Varvello / Mineral Service
Beraunite: Fe++Fe+++5(PO4)4(OH)5·4(H2O)
Comments: Green and reddish brown, beraunite aggregates. Location: Arean Claim, Three Oak Gap, Mena, Polk County, Arkansas, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
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
Berezanskite: KLi3Ti2Si12O30
Comments: Granular white berezanskite in quartz. Location: Dara-i-Pioz Glacier, Altai Range, Tadzhikistan. Scale: Specimen Size 1.5x2.5 cm. © Diederik Visser
Bergenite: Ca2Ba4[(UO3)2O2(PO4)2]3 (H2O)16
Comments: Yellow bladed bergenite crystals. Location: Mechelserrun, Saxony, Germany. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals