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Bobierrite: Mg3(PO4)2·8(H2O)
Comments: Crystal group of bobierrite partially covered by yellow calcite. Location: Zheleznyi Mine, Kovdor, Kola Penisula, Russia. Scale: Crystal size 1 cm. © John Veevaert
Boleite: KPb26Ag9Cu24Cl62(OH)48
Comments: Floater crystal of deep, inky blue boleite with interpenetration twinning. Location: Amelia Mine, Santa Rosalia, Baja California, Mexico. Scale: 0.7 cm. © John Veevaert
Boltwoodite: HK(UO2)(SiO4)·1.5(H2O)
Comments: Sprays of boltwoodite covering matrix. Location: Rossing, Namibia. Scale: Size Not Given. © John Veevaert
Botryogen: MgFe+++(SO4)2(OH)·7(H2O)
Comments: Bright orange botryogen on white calcite showing it's characteristic botryoidal "grape-like" morphology. Location: Cerro Pintados, Poza Almonte, Pampa del Tamarugal, Chile. Scale: Picture size 1 cm. © John Veevaert
Boulangerite: Pb5Sb4S11
Comments: Specimen of sulfide rich matrix with a surface coated with hair-like crystals of boulangerite. Location: Noche Buena Mine, Zacatecas, Mexico. Scale: 9 x 6.5 cm. © John Veevaert
Braunite-II: Mn++Mn+++6SiO12 Braunite-I: Mn++Mn+++6SiO12
Comments: Crystals of braunite. Location: Black Rock Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: Crystal size 1.3 cm. © John Veevaert
Brucite: Mg(OH)2
Comments: Crystal cluster of brucite. Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 7 x 5 x 4 cm. © John Veevaert
Bultfonteinite: Ca2SiO2(OH,F)4 Poldervaartite: (Ca,Mn++)2SiO3(OH)2
Comments: Bow-tie clusters of white, acicular bultfonteinite and blocky, beige-colored poldervaartite on matrix. Location: N'Chwaning mine, South Africa. Scale: picture size 4 cm. © John Veevaert
Bultfonteinite: Ca2SiO2(OH,F)4
Comments: Rounded, spherical aggregation of acicular bultfonteinite crystals. Location: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 8.5 x 4.6 cm. © John Veevaert
Burbankite: (Na,Ca)3(Sr,Ba,Ce)3(CO3)5
Comments: White crystal of burbankite (see arrow) and bluish green fluorite on matrix. Location: Pocos de Caldes, Minas Gerais, Brazil. Scale: Crystal size 2 mm. © John Veevaert