Mineral Specimen Images (B)

Brenkite: Ca2(CO3)F2

Comments: Spherical aggregate of colorless crystals of brenkite.
Location: Schellkopf, Brenk, Eifel Mts, Rhineland-Palatinate, Germany. Scale: Picture size 7.5 mm.
© Thomas Witzke / Abraxas-Verlag

Brewsterite-Ba: (Ba,Sr)Al2Si6O16·5(H2O)

Comments: Colorless to off-white striated prismatic brewsterite-Ba crystals.
Location: Strontian, North West Highlands (Argyllshire), Scotland, UK. Scale: See Image.
© Rruff Database

Brewsterite-Sr: (Sr,Ba)Al4Si12O32·10(H2O)

Comments: Translucent brewsterite crystals on matrix.
Location: Yellow Lake, Olalla, Osoyoos Mining Division, British Columbia, Canada. Scale: 35x30x20 mm.
© John Betts - Fine Minerals

Brianyoungite: Zn3(CO3,SO4)(OH)4

Comments: Silky white aggregates of brianyoungite with small yellow crystals of sulfur on sphalerite.
Location: St Johannes Mine, Wolkenstein, Erzgebirge, Saxony, Germany. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

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

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

Brindleyite: (Ni,Mg,Fe++)2Al(SiAl)O5(OH)4

Comments: Greenish waxy crust of brindleyite.
Location: Hachita, Grant County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Britholite-(Ce): (Ce,Ca,Th,La,Nd)5(SiO4,PO4)3(OH,F)

Comments: Dark gray, parallel aggregates of britholite-(Ce) crystals in matix..
Location: Rusty Gold Mine, Jamestown District, Boulder Co., Colorado, USA. Scale: See Image.
© Paul M. Schumacher

Britholite-(Y): (Y,Ca)5(SiO4,PO4)3(OH,F)

Comments: Brown cm-size britholite-(Y) grains with typical prismatic 'apatite' outline in quartz matrix with black magnetite. Tengerite-(Y) forms the white encrustation in upper right part of the photo.
Location: West Keivy Block, Western Keivy Massif, Kola peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture Size 3.5x3.5 cm.
© Pavel M. Kartashov

Brizziite-III: NaSb+++++O3  
Brizziite-VII: NaSb+++++O3

Comments: Colorless thin hexagonal plates of brizziite. Brizzite-VII and brizzite-III are the same mineral with different Dana classification numbers.
Location: Le Cetine di Cotorniano, Chiusdino, Siena Province, Tuscany, Italy. Scale: See Image.
© Rruff Database

Brizziite-VII: NaSb+++++O3  
Brizziite-III: NaSb+++++O3

Comments: Colorless thin hexagonal plates of brizziite. Brizzite-VII and brizzite-III are the same mineral with different Dana classification numbers.
Location: Le Cetine di Cotorniano, Chiusdino, Siena Province, Tuscany, Italy. Scale: See Image.
© Rruff Database

Brochantite: Cu4(SO4)(OH)6

Comments: Blue green spray of acicular brochantite crystals on matrix.
Location: Douglas Hill, Lidwig, Lyon County, Nevada, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Brochantite: Cu4(SO4)(OH)6  
Linarite: PbCu(SO4)(OH)2

Comments: Deep blue, acicular, linarite with light blue, globular brochantite on white quartz.
Location: Goulmina, Er Rachidia, Morroco. Scale: Crystal size 1.5 cm.
© Fabre Minerals

Brochantite: Cu4(SO4)(OH)6

Comments: Prismatic crystals of blue green brochantite.
Location: Grand View Mine, Grand Canyon, Coconino County, Arizona, USA. Scale: See Image.
© Jeff Weissman / Photographic Guide to Mineral Species

Brockite: (Ca,Th,Ce)(PO4)·(H2O)

Comments: Red-brown opaque massive brockite.
Location: Anna Lee Mine, Custer County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Brodtkorbite: Cu2HgSe2

Comments: Polished section with partially crossed polarizers showing brodtkorbite (br) in association with tiemannite (ti) and berzelianite (bz). (CanMin, v40:225).
Location: Telethermal selenide vein-type assemblage at the Tuminico Ia selenium deposit, Sierra de Cacho (Sierra de Umango) district, La Rioja, Argentina. Scale: Picture Size 0.5 x 0.35 mm.
© Canadian Mineralogist

Bromargyrite: AgBr

Comments: Butterscotch colored bromargyrite cube.
Location: Broken Hill, New South Wales, Australia. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Bromellite: BeO

Comments: Nearly colorless translucent crystalline bromellite in chloritic schistose rock.
Location: Pitkyaranta, Republic of Karelia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bromellite: BeO  
Magnesioferrite: MgFe+++2O4

Comments: A micro, water color, hexagonal or barrel shaped crystal of white bromellite to about 0.3 mm on yellowish calcite with associated black magnesioferrite.
Location: Langban, Varmland, Sweden. Scale: 18x9x10mm.
© Tom Loomis / Dakota Matrix

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

Brownleeite: MnSi

Comments: Cubic grain of brownleeite (false colored magenta) in the bottom of a pit as captured by aerogel.
Location: Interplanetary dust particle (IDP) that appears to have originated from comet 26P/Grigg-Skjellerup. Scale: See Image.
© NASA