Biotite K(Mg,Fe)3 AlSi3 O10 (OH,F)2
Mica Siderophyllite , Phlogopite , Phlogopite (var. Fe) , Biotite-1M , Fluorotetraferriphlogopite , Fluorophlogopite (var. synthetic) , Oxyphlogopite , Biotite-2M1 , Tetraferriphlogopite , Fluorannite , Tetraferriannite , Fluorophlogopite , Eastonite , Annite
Open
Biotite specimen from Rist Mine, Hiddenite, Alexander County, North Carolina, USA
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
7
10
7
EDS, Reflectance
Hydroxide , Aluminosilicate , Subgroup
Biotite-1M K(Mg,Fe)3 AlSi3 O10 (OH,F)2
Biotite —
5
0
0
—
Polytype
Biotite-2M1 K(Mg,Fe)3 AlSi3 O10 (OH,F)2
Biotite —
1
0
0
—
Polytype
Bismuth Bi
—
—
Open
Ultrapure bismuth forms hopper crystals when cooling from the melt. A thin oxide layer forms, creating interference colors.
Photo by David Abercrombie (via flickr), CC-BY-SA 2.0
1
17
2
SXES
Mineral , Metal , Element
Boehmite AlO(OH)
Minerals containing OH —
Open
Böhmite crystals on natrolite, from Sagåsen (Strandåsen), Mørje, Porsgrunn, Telemark, Norway
Photo by Leon Hupperichs, CC-BY-SA 3.0
1
11
0
IR
Mineral, Hydroxide
Boltwoodite (H3 O)(Na,K)(UO2 )SiO4 ·(H2 O), (K,Na)(UO2 )(SiO3 OH)·1.5H2 O
Minerals containing OH , Minerals containing H2O , Uranophane (group) —
Open
Boltwoodite on calcite, from Goanikontes Claim, Arandis, Swakopmund District, Erongo Region, Namibia
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
0
5
0
PL
Hydroxide , Mineral, Silicate , Uranyl , Hydrated
Bonattite Cu(SO4 )·3H2 O
Minerals containing H2O , Minerals containing SO4 —
2
0
0
—
Mineral, Hydrated , Sulphate
Boracite Mg3 B7 O13 Cl
Boracite (group) —
Open
Dodecahedron of boracite, from the type locality at Lüneburg Kalkberg, Lower Saxony, Germany. Size: 1.2 x 1.1 x 0.9 cm
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
0
1
0
PL/XL
Mineral, Halide , Borate
Boracite (group) (Mg,MnII ,FeII )3 B7 O13 Cl
—
Ericaite , Boracite , Chambersite , Trembathite , Congolite
0
1
0
PL/XL
Borate , Halide, Group
Borax Na2 B4 O5 (OH)4 ·8H2 O
Minerals containing OH , Minerals containing H2O —
0
1
0
PL
Hydroxide , Mineral, Hydrated , Borate
Borcarite Ca4 MgB4 O6 (CO3 )2 (OH)6
Minerals containing CO3 , Minerals containing OH —
Open
Borcarite with small white crystals of cahnite, from Huanggang Fe-Sn deposit (Huanggangliang Mine), Hexigten Banner (Keshiketeng Co.), Ulanhad League (Chifeng Prefecture), Inner Mongolia Autonomous Region, China
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
0
4
0
PL/XL
Hydroxide , Mineral, Borate , Carbonate
Bornite Cu5 FeS4
—
—
Open
A specimen of Bornite, from the Lavender Open Pit Mine, Bisbee, Cochise Co., Arizona, USA. Size: 9.6 x 6.9 x 4.2 cm.
Photo by Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
17
0
0
—
Mineral, Sulphide
Boron B
—
—
Open
Polycrystalline chunks of rhombohedral β-boron, net 25.5 grams
(C) 2013 James L. Marshall, University of North Texas. CC-BY-SA 3.0. Via Wikimedia Commons.
1
2
1
SXES
Element , Metal
Boron nitride BN
—
Qingsongite
Open
Hexagonal boron nitride crystals
Photo by NIMSoffice, Public Domain
2
46
3
CL/SEM, SXES
Synthetic , Compound, Boride , Nitride
Boulangerite Pb5 Sb4 S11
—
—
2
0
0
—
Mineral, Sulphide
