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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
Borax: Na2B4O5(OH)4·8(H2O)
Comments: Translucent crystal of borax preserved in oil to prevent dehydration to tincalconite. Location: Searles Lake, San Bernardino County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Borcarite: Ca4MgB4O6(OH)6(CO3)2 Szaibelyite: MgBO2(OH)
Comments: Pale aqua granular borcarite with white fibrous to granular szaibelyite. Location: Nalednoya, Republic of Sakha, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bornemanite: BaNa3{(Na,Ti)4[(Ti,Nb)2O2Si4O14](F,OH)2}·PO4 Lomonosovite: Na5Ti2O2(Si2O7)(PO4)
Comments: Yellow crystalline bornemanite in dark brown lomonosovite. Location: Yubileinaya Pegmatite, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Boromuscovite: KAl2(Si3B)O10(OH,F)2
Comments: Grayish-white coatings of boromuscovite on lavender lepidolite crystals. Location: Little Three Mine, Ramona, San Diego County, Californi, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Botryogen: MgFe+++(SO4)2(OH)·7(H2O)
Comments: Reddish to yellowish crystalline botryogen. Location: Redington Mercury Mine, Knoxville, Napa County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Bottinoite: NiSb+++++2(OH)12·6(H2O)
Comments: Pale blue botryoidal bottinoite on calcite. Location: Dornberg, Ramsbeck, Sauerland, Nordrhein-Westfalen, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Boyleite: (Zn,Mg)SO4·4(H2O)
Comments: Powdery white crust of boyleite on pyrite. Location: Kotzebue, Alaska, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Brabantite: CaTh(PO4)2
Comments: Altering micro grain of brabantite. Location: Kuttakuzhi, near Trivandrum, Travancore, Kerala, India. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Brammallite: (Na,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,(H2O)]
Comments: Dark gray-brown fine grained massive brammallite. Location: Near Ione, Amador County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species