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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
Boleite: KPb26Ag9Cu24Cl62(OH)48 Cumengite: Cu20Pb21Cl42(OH)40·6H2O
Comments: Inky blue cumengite "sixling" epitaxially overgrown on boleite. Location: Amelia mine, Santa Rosalia, Baja California Sur, Mexico. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Bolivarite: Al2(PO4)(OH)3·4-5(H2O)
Comments: Yellow translucent mass of bolivarite. Location: Pontevedra, Galicia, Spain. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Boltwoodite: HK(UO2)(SiO4)·1.5(H2O)
Comments: Sprays of boltwoodite covering matrix. Location: Rossing, Namibia. Scale: Size Not Given. © John Veevaert
Comments: Bright yellow, prismatic crystals of boltwoodite. Location: Rössing mine, Swakopmund District, Namibia. Scale: Picture size 2.5 mm. © Paul M. Schumacher
Comments: Yellow, globular aggregates of boltwoodite on a ferruginous matrix. Location: Repete Mine, San Juan County, Utah, USA. Scale: See Image. © Jeff Weissman / Photographic Guide to Mineral Species
Bonattite: CuSO4·3(H2O)
Comments: Blue bonattite on siliceous sinter. Location: Steamboat Springs, Washoe County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bonshtedtite: Na3Fe++(PO4)(CO3)
Comments: Oriented gray bands of bonshtedtite in calcite. Location: Kovdor Massif, Kola Peninsula. Scale: 3.9x2.3x1.5 cm. © Richard Dale / Dale Minerals
Boothite: CuSO4·7(H2O) Halotrichite: Fe++Al2(SO4)4·22(H2O)
Comments: Pale blue earthy boothite with white halotrichite. Location: Copiapo, Atacama, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Boracite: Mg3B7O13Cl
Comments: A greenish crystal of boracite, a tetrahedron modified by cube and dodecahedral faces. Location: Bernburg, Sachsen-Anhalt, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Boracite: Mg3B7O13Cl Hilgardite: Ca2B5O9Cl·(H2O)
Comments: Sub-mm reddish orange crystals of hilgardite on white boracite. Location: Boulby Mine, Loftus, Cleveland, Great Britain. Scale: 1.5 x 2.5 cm. © John Veevaert
Comments: Clear, pale green pseudo-cubic boracite crystal. Location: Sonderhausen, Thuringia, Germany. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals