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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