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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
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
Bermanite: Mn++Mn+++2(PO4)2(OH)2·4(H2O)
Comments: Brown bermanite crystal. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Beryl: Be3Al2Si6O18
Comments: Red beryl prism on rhyolite matrix. Location: Violet claims, Wah Wah Mountains, Beaver County, Utah, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Bikitaite: Li2[Al2Si4O12]·2(H2O)
Comments: Clear, crystalline bikitaite laths on matrix. Location: Foote mine, Kings Mountain, Cleveland County, North Carolina, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Billietite: Ba(UO2)6O4(OH)6·8(H2O)
Comments: Clear, yellow crystal of billietite. Location: Shinkolobwe mine, Tantara, Shaba, Dem. Repub. Congo. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Biotite: K(Mg,Fe++)3[AlSi3O10(OH,F)2
Comments: Brown book of pseudohexagonal biotite crystals in matrix. Location: Sattleberg, Laacher See, Rhineland-Palatinate, Germany. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Bismuth: Bi
Comments: Skeletal trigonal crystal of native bismuth. Location: Schneeberg, Saxony, Germany. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Bjarebyite: (Ba,Sr)(Mn++,Fe++,Mg)2Al2(PO4)3(OH)3
Comments: Green, pyramidal crystals of bjarebyite. Location: Palermo No. 1 mine, North Groton, Grafton County, New Hamphshire, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Boracite: Mg3B7O13Cl
Comments: Clear, pale green pseudo-cubic boracite crystal. Location: Sonderhausen, Thuringia, Germany. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals