Mineral Specimen Images (B)

Brackebuschite: Pb2(Mn,Fe++)(VO4)2(OH)  
Krettnichite: PbMn+++2(VO4)2(OH)2

Comments: Scanning electron microscope image of a prismatic krettnichite (kr) aggregate associated with manganite (ma) and barian brackebuschite (br) in a vug. The inset is a close-up illustrating the morphology of brackebuschite. (Eur. J. Mineral, 13:146).
Location: hydrothermal manganite-quartz vein at the historic manganese deposit of Krettnich, Saarland, Germany. Scale: See Image.
© Eur. J. Mineral

Bradaczekite: NaCu4(AsO4)3

Comments: SEM image of the aggregates of bradaczekite crystals. (CanMin, v39 , p 1116).
Location: North Breach of the Great fissure Tolbachik eruption (GFTE) in 1975-1976, Kamchatka Peninsula, Russia. Scale: Magnification: ~ 600x.
© Canadian Mineralogist

Bradleyite: Na3Mg(PO4)(CO3)  
Loughlinite: Na2Mg3Si6O16·8(H2O)

Comments: Silky fibrous veinlets of loughlinite with bradleyite.
Location: Green River area, Sweetwater County, Wyoming, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Braggite: (Pt,Pd,Ni)S

Comments: Silvery grain of braggite in brassy-iridescent pentlandite matrix.
Location: Stillwater Complex, Sweetwater Co., Montana, USA. Scale: 3 mm grain.
© Tom Loomis / Dakota Matrix

Braitschite-(Ce): (Ca,Na2)7(Ce,La)2B22O43·7(H2O)

Comments: Aggregates of white to red-brown platy Braitschite-(Ce) in halite matrix.
Location: Cane Creek near Moab, Grand Co., Utah, USA. Scale: Specimen Size 2x2.5 cm.
© Diederik Visser

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

Brandtite: Ca2(Mn,Mg)(AsO4)2·2(H2O)

Comments: Clear, crystalline brandtite aggregates.
Location: Harstig mine, Pajsberg, Varmland, Sweden. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Brannerite: (U,Ca,Ce)(Ti,Fe)2O6

Comments: Black grains of brannerite with gold and other minerals.
Location: Witwatersrand field, South Africa. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Brannockite: KSn2Li3Si12O30

Comments: Clear, hexagonal plates of brannockite crystals.
Location: Foote mine, Kings Mountain, Cleveland County, North Carolina, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Brass: Cu3Zn2

Comments: Small brassy metallic grain of brass.
Location: Nurek Ore District, Uzbekistan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Brassite: Mg(AsO3OH)·4(H2O)

Comments: Opaque white botryoidal masses of brassite on matrix.
Location: Mine de Salsigne, Aude, France. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Braunite-I: Mn++Mn+++6SiO12  
Braunite-II: Mn++Mn+++6SiO12

Comments: Crystals of braunite.
Location: Black Rock Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: Crystal size 1.3 cm.
© John Veevaert

Braunite-I: Mn++Mn+++6SiO12  
Donpeacorite: (Mn,Mg)MgSi2O6

Comments: Brown crystalline massive donpeacorite with dark brown black braunite.
Location: Zinc Corporation of America Mine #4, Balmat, Saint Lawrence County, New York, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Braunite-I: Mn++Mn+++6SiO12  
Macfallite: Ca2(Mn+++,Al)3(SiO4)(Si2O7)(OH)3  
Johnsenite-(Ce): Na12(Ce,REE,Sr)3Ca6Mn3Zr3W(Si25O73)(CO3)(OH,Cl)2

Comments: Tiny - less than 1mm - maroon crystals of mcfallite suspended as inclusions in massive quartz along with larger spots of brown johnsenite-(Ce) and braunite.
Location: Artur mine, Jaguaracu, Minas Gerais, Brazil. Scale: Overall 3 x 2.5 slab.
© Tom Loomis / Dakota Matrix

Braunite-II: Mn++Mn+++6SiO12  
Braunite-I: Mn++Mn+++6SiO12

Comments: Crystals of braunite.
Location: Black Rock Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: Crystal size 1.3 cm.
© John Veevaert

Bravoite: (Fe,Ni,Co)S2

Comments: Steel gray, metallic crystal of bravoite on brassy yellow chalcopyrite.
Location: Gey, Rhineland-Palatinate, Germany. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of 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

Bredigite: Ca7Mg(SiO4)4  
Spurrite: Ca5(SiO4)2(CO3)

Comments: White veins of bredigite in massive gray spurrite (slabbed specimen).
Location: Camphouse, Ardnamurchan, Argyll, Highland, Scotland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Breithauptite: NiSb

Comments: Three brownish, metallic hexagonal prisms of breithauptite in calcite.
Location: Sarrabus, Sardinia, Italy. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Brendelite: (Bi,Pb)2Fe(PO4)(O,OH)3

Comments: Small brown tabular crystals of brendelite on matrix.
Location: Güldener Falk Mine, Schneeberg, Erzgebirge, Sachsen, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag