Mineral Specimen Images (B)

Bornite: Cu5FeS4  
Isomertieite: Pd11Sb2As2  
Arsenopalladinite: Pd8(As,Sb)3  
Gold: Au

Comments: Light grayish grain of intimately intergrown isomertieite and arsenopalladinite (in the center of the picture), with pale yellow gold and brownish to violet bornite. Polished section (from microprobe analysis) in reflected light.
Location: Noril'sk, Putoran Mts, Taymyrskiy Autonomous Okrug, Eastern-Siberian Region, Russia. Scale: Picture size 0.1 mm.
© Thomas Witzke / Abraxas-Verlag

Bornite: Cu5FeS4  
Briartite: Cu2(Zn,Fe)GeS4  
Catamarcaite: Cu6GeWS8

Comments: Briartite-type phase (Bri) in close association with catamarcaite (Ct) lining a cavity in massive bornite (Bn) - chalcocite (Cc) ore; Sp is sphalerite (CanMin v44:1481).
Location: Bornite-rich ore from old dumps near the La Rosario vein, Capillitas epithermal deposit, Catamarca Province, Argentina.. Scale: See Image.
© Canadian Mineralogist

Borocookeite: Li(1+3x)Al(4-x)(BSi3)O10(OH,F)8 [x = 0-0.33]

Comments: Black and white image of multicolored tourmaline crystals (1) in fine-flaky aggregate of borocookeite (2). (AmMin, v 88, p 831).
Location: Sosedka and Mokhovaya pegmatite veins, Malkhan gem tourmaline deposit, Chikoy district, Chita oblast, Russia. Scale: Sample size is 5 x 5 cm.
© American Mineralogist

Boromullite: Al4.5SiB0.5O9.5

Comments: PPL image of holotype boromullite prism in thin section 2006-MST22a. Bmu = boromullite, Crd = cordierite, Hc = hercynite, Kfs = K-feldspar, Sil = sillimanite. Eur. J. Mineral v20:935.
Location: Mount Stafford, central Australia. Scale: See Image.
© Eur. J. Mineral

Boromullite: Al4.5SiB0.5O9.5

Comments: BSE image of holotype boromullite prism in thin section 2006-MST22a. Bmu = boromullite, Crd = cordierite, Hc = hercynite, Kfs = K-feldspar, Sil = sillimanite. Eur. J. Mineral v20:935.
Location: Mount Stafford, central Australia. Scale: See Image.
© Eur. J. Mineral

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

Borovskite: Pd3SbTe4  
Temagamite: Pd3HgTe3  
Merenskyite: (Pd,Pt)(Te,Bi)2

Comments: Borovskite (Bvk) - temagamite (Tmg) - merenskyite (Mrk) composite grain included in chalcopyrite (Ccp). (CanMin, v 42, p 674).
Location: McBratney high-grade PGE-Au occurrence, Bear Lake mafic unit, Proterozoic Flin Flon greenstone belt, Manitoba, Canada. Scale: See Image.
© Canadian Mineralogist

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

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

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

Botryogen: MgFe+++(SO4)2(OH)·7(H2O)  
Redingtonite: (Fe++,Mg,Ni)(Cr,Al)2(SO4)4·22(H2O)

Comments: Pale pink granular redingtonite on yellow-brown botryogen.
Location: Redington 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

Bouazzerite: Bi6(Mg,Co)11Fe14[AsO4]18O12(OH)4(H2O)86

Comments: SEM image of prismatic bouazzerite crystals associated with botryoidal powellite and minute cubic crystals of alumopharmacosiderite.
Location: From the "Filon 7" (French for Vein 7) through "Puits 1" (shaft 1), Bou Azzer mine, Anti-Atlas, Morocco.. Scale: See Image.
© American Mineralogist

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

Bournonite: PbCuSbS3

Comments: Lustrous, silvery crystals of bournonite on massive bournonite.
Location: Mercedes Mine, Huanuco Dept., Peru. Scale: 3x3x2.7 cm.
© Isaias Casanova / IC 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

Boussingaultite: (NH4)2Mg(SO4)2·6(H2O)

Comments: White, crystalline aggregates boussingaultite.
Location: Anna Mine, Alsdorf, Aachen, North Rhine-Westphalia, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Bowieite: (Rh,Ir,Pt)1.77S3

Comments: Epoxy grain mount of polished gray metallic grains or bowieite.
Location: Novoseltsi, Burgas Oblast (Bourgas Oblast), Bulgaria. Scale: See Image.
© Rruff Database

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