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Beryl: Be3Al2Si6O18
Comments: Transparent Goshenite, the colorless variety of beryl with orthoclase and muscovite. Location: Pingwu, Sichuan, China. Scale: 9 x 8.5 cm. © Fabre Minerals
Beryl: Be3Al2Si6O18 Calcite: CaCO3
Comments: Transparent emerald, the green variety of beryl on calcite (marble) matrix. Location: Coscuez, Boyacá, Colombia. Scale: 2.5 x 2.5 cm. © Fabre Minerals
Betekhtinite: Cu10(Fe,Pb)S6
Comments: Black crystalline aggregate of betekhtinite with white calcite. Location: Twin Pocket, Mine #57, Dzhezkazgan, Kazakhstan. Scale: 9.5 x 7.5 cm. © Fabre Minerals
Bismuth: Bi
Comments: Coarsely crystalline bismuth. Location: Biggenden, Queensland, Australia. Scale: 2.9 x 1.8 x 2.8 cm. © Fabre Minerals
Bismuthinite: Bi2S3
Comments: Metallic, prismatic bismuthinite crystal topped with botryoidal marcasite. Location: Veta Farellón viejo, Tazna, Potosí, Bolivia. Scale: 4.4x1.3x0.4 cm. © Fabre Minerals
Botallackite: Cu2Cl(OH)3
Comments: Well crystallized (although the crystals are small) botallackite on matrix. Location: A European classic from the type locality, Botallack mine, St Just, England. Scale: 5 x 4 cm. © Fabre Minerals
Bournonite: PbCuSbS3
Comments: Bright, blocky crystalline aggregate of steel gray bournonite crystals. Location: Yao-gan-xian mine, Hunan China. Scale: Picture size 2 cm. © Fabre Minerals
Brazilianite: NaAl3(PO4)2(OH)4
Comments: Gemmy brazilianite crystal. Location: Marcel Telirio mine, Divino das Laranjeiras, Minas Gerais, Brazil. Scale: Size Not Given. © Fabre Minerals
Brookite: TiO2
Comments: Brookite crystal group on matrix. During the 19th century this site produced some of the best brookite ever seen. Location: Classic Welsh locality of Prenteg, Gwynedd, Wales, UK. Scale: 4 x 4.5 cm. © Fabre Minerals
Cassiterite: SnO2
Comments: Gemmy, doubly terminated cassiterite on quartz-mica matrix. Location: Langcangjiang river area, Yunnan, China. Scale: 2.7 x 2.2 x 1.8 cm. © Fabre Minerals
Comments: Very brilliant black crystals of cassiterite on white mica. Location: Xue Bao Diang, Sichuan, China. Scale: Size Not Given. © Fabre Minerals