's Image Gallery

Boltwoodite: HK(UO2)(SiO4)·1.5(H2O)

Comments: Bright yellow, prismatic crystals of boltwoodite.
Location: Rössing mine, Swakopmund District, Namibia. Scale: Picture size 2.5 mm.
© Paul M. Schumacher

Boltwoodite: HK(UO2)(SiO4)·1.5(H2O)

Comments: Yellow, globular aggregates of boltwoodite on a ferruginous matrix.
Location: Repete Mine, San Juan County, Utah, USA. Scale: See Image.
© Jeff Weissman / Photographic Guide to Mineral Species

Bonattite: CuSO4·3(H2O)

Comments: Blue bonattite on siliceous sinter.
Location: Steamboat Springs, Washoe County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bonshtedtite: Na3Fe++(PO4)(CO3)

Comments: Oriented gray bands of bonshtedtite in calcite.
Location: Kovdor Massif, Kola Peninsula. Scale: 3.9x2.3x1.5 cm.
© Richard Dale / Dale Minerals

Boothite: CuSO4·7(H2O)  
Halotrichite: Fe++Al2(SO4)4·22(H2O)

Comments: Pale blue earthy boothite with white halotrichite.
Location: Copiapo, Atacama, Chile. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Boracite: Mg3B7O13Cl

Comments: Clear, pale green pseudo-cubic boracite crystal.
Location: Sonderhausen, Thuringia, Germany. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Boracite: Mg3B7O13Cl

Comments: A greenish crystal of boracite, a tetrahedron modified by cube and dodecahedral faces.
Location: Bernburg, Sachsen-Anhalt, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Boracite: Mg3B7O13Cl  
Hilgardite: Ca2B5O9Cl·(H2O)

Comments: Sub-mm reddish orange crystals of hilgardite on white boracite.
Location: Boulby Mine, Loftus, Cleveland, Great Britain. Scale: 1.5 x 2.5 cm.
© John Veevaert

Boralsilite: Al16B6Si2O27  
Grandidierite: (Mg,Fe++)Al3(BO4)(SiO4)O

Comments: B&W PPL image of aggregates of boralsilite in quartz near grandidierite. Pyrite is partially replaced by oxide. Abbrev: A+B = Secondary andalusite, B = boralsilite, G = grandidierite, P = pyrite, Q = quartz. (AmMin v93:294).
Location: Pegmatites from the Larsemann Hills, East Antarctica. Scale: See Image.
© American Mineralogist

Borax: Na2B4O5(OH)4·8(H2O)

Comments: Translucent crystal of borax preserved in oil to prevent dehydration to tincalconite.
Location: Searles Lake, San Bernardino County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Borcarite: Ca4MgB4O6(OH)6(CO3)2  
Szaibelyite: MgBO2(OH)

Comments: Pale aqua granular borcarite with white fibrous to granular szaibelyite.
Location: Nalednoya, Republic of Sakha, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Borcarite: Ca4MgB4O6(OH)6(CO3)2  
Numanoite: Ca4CuB4O6(OH)6(CO3)2

Comments: Zoned borcarite (Bc) crystal with a core of green numanoite (Nm). CanMin 45:307.
Location: Fuka mine, 40 km west-northwest of Okayama City, western Japan. Scale: See Image.
© Canadian Mineralogist

Bornemanite: BaNa3{(Na,Ti)4[(Ti,Nb)2O2Si4O14](F,OH)2}·PO4  
Lomonosovite: Na5Ti2O2(Si2O7)(PO4)

Comments: Yellow crystalline bornemanite in dark brown lomonosovite.
Location: Yubileinaya Pegmatite, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bornemanite: BaNa3{(Na,Ti)4[(Ti,Nb)2O2Si4O14](F,OH)2}·PO4

Comments: Pale yellow or peach colored, massive bornemanite.
Location: Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Bornite: Cu5FeS4

Comments: Metallic, crystalline bornite crystal with bluish tarnish.
Location: Kamoto mine, Kolwezi, Shaba, Dem. Repub. Congo. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

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