Mineral Specimen Images (B)

Birchite: Cd2Cu2(PO4)2(SO4)·5H2O

Comments: SEM image showing bladed crystals of birchite on anglesite. The crystals are flattened on (100) and show the principal forms {100}, {010}, and {101}. (AmMin, v93:912).
Location: Block 14 Opencut, Broken Hill, New South Wales, Australia. Scale: Scale Bar 50µm.
© American Mineralogist

Birnessite: (Na,Ca,K)x(Mn++++,Mn+++)2O4·1.5(H2O)

Comments: Gray birnessite. Very small crystals on massive material.
Location: Das Aufgeklärte Glück Mine, Hasserode, Wernigerode, Harz Mts, Saxony-Anhalt, Germany. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Birnessite: (Na,Ca,K)x(Mn++++,Mn+++)2O4·1.5(H2O)  
Buserite:

Comments: Round, "rabbit pellets" of buserite which dehydrates to birnessite when dry. Image photographed through water which is needed to preserve this species.
Location: Aomori Springs, Oppu, Japan. Scale: Sphere size 7 mm.
© Dave Barthelmy

Bischofite: MgCl2·6(H2O)

Comments: Colorless grains of bischofite. The mineral is very hygroscopic and must be stored in a closed vial.
Location: Stassfurt, Stassfurt Deposit, Saxony-Anhalt, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Bismite: Bi2O3

Comments: Tan, massive bismite with quartz.
Location: Schneeberg, Sachsen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bismite: Bi2O3  
Waylandite: BiAl3(PO4)2(OH)6

Comments: Gray massive stream rounded waylandite with tan bismite crusts.
Location: Mumba, Nord-Kivu, Zaire. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bismoclite: BiOCl

Comments: Opaque white pearly crystalline bismoclite on matrix.
Location: Falcacci Mine, Rio Marina, Elba, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bismuth: Bi

Comments: Skeletal trigonal crystal of native bismuth.
Location: Schneeberg, Saxony, Germany. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Bismuth: Bi

Comments: Coarsely crystalline bismuth.
Location: Biggenden, Queensland, Australia. Scale: 2.9 x 1.8 x 2.8 cm.
© Fabre Minerals

Bismuth: Bi  
Matildite: AgBiS2  
Bismuthinite: Bi2S3

Comments: SEM image of native Bi replaced by bismuthinite and matildite. Black areas represent gangue minerals. (CanMin, v43:899).
Location: Uranium deposit at Niederschlema-Alberoda, Germany. Scale: See Image.
© Canadian Mineralogist

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

Bismuthinite: Bi2S3  
Cannonite: Bi2O(OH)2SO4

Comments: Opaque white crystal tufts of cannonite on quartz crystals with dark, metallic bismuthinite.
Location: Marysvale, Piute County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bismuthinite: Bi2S3  
Matildite: AgBiS2  
Bismuth: Bi

Comments: SEM image of native Bi replaced by bismuthinite and matildite. Black areas represent gangue minerals. (CanMin, v43:899).
Location: Uranium deposit at Niederschlema-Alberoda, Germany. Scale: See Image.
© Canadian Mineralogist

Bismutite: Bi2(CO3)O2

Comments: White to green earthy crust of bismutite.
Location: La Higuera, Coquimbo, Chile. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bismutocolumbite: Bi(Nb,Ta)O4

Comments: Black crystals of bismutocolumbite.
Location: Malkhan, Krasny Chikoy, Transbaikalia, Siberia. Scale: Picture Size 5 mm.
© Thomas Witzke

Bismutoferrite: BiFe+++2(SiO4)2(OH)

Comments: Yellow-greenish, earthy bismutoferrite.
Location: Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Specimen size 8.5 cm.
© Thomas Witzke / Abraxas-Verlag

Bismutomicrolite: (Bi,Ca)(Ta,Nb)2O6(OH)

Comments: A dark crystal of bismutomicrolite in pearly muscovite.
Location: Malkhan Range, Krasny Chikoy, Chitinskaya Oblast', Transbaikalia, Eastern-Siberian Region, Russia. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Bismutotantalite: Bi(Ta,Nb)O4

Comments: Tan coatings of bismutotantalite on white feldspar with pink lepidolite.
Location: Harding Mine, Taos County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bityite: CaLiAl2(AlBeSi2)O10(OH)2

Comments: White crystalline bityite in silvery mica matrix.
Location: Harding Mine, Taos County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bixbyite: (Mn+++,Fe+++)2O3

Comments: Cubic crystals of bixbyite reaching 5 mm sit on a crude pseudomorph of hematite after garnet.
Location: Thomas Range, Juab Co., Utah, USA. Scale: 1.5 x 1.6 cm.
© Isaias Casanova / IC Minerals