Mineral Information and Data:

Bismuth
Bi [CNMNC approved formula]

Named from German, probably for white mass, weisse Masse, later Wismuth.

IMA status : Valid species (Pre-IMA 1500) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
01.03.01.04  
  (01) Native Elements
  (01.03) with semi-metallic and non-metallic elements
  (01.03.01) Arsenic group
  
Nickel-Strunz
(10th edition) :
01.CA.05
  (01) Elements
  (01.C) Metalloids and Nonmetals
  (01.CA) Arsenic group elements
  
Crystal system: Trigonal System
Point group (H-M): 3m (or 3 2/m) — hexagonal-scalenohedral
Unit cell: a = 4.55 Ǻ, c = 11.86 Ǻ
Crystal Habit: Crystals indistinct; massive, reticulated, branching, foliated
Twinning: Common on {10-14}, polysynthetic
  
Color: Silver-white with pinkish tint; tarnishes iridescent
Diaphaneity: Opaque
Luster: Metallic
Hardness (Mohs): 2 to 2.5
Measured Density: 9.70 to 9.83 g/cm3
Cleavage: 3; {0001} perfect, {1011} good, {1014} imperfect
Tenacity: Brittle, sectile
Streak: Silver-white
  
Geologic Setting: In hydrothermal veins with ores of Co, Ni, Ag, and Sn; in pegmatites and topaz-bearing Sn–W quartz veins.
Mineral Association: Chalcopyrite, arsenopyrite, pyrrhotite, pyrite, cobaltite, nickeline, breithauptite,
skutterudite, safflorite, lollingite, bismuthinite, silver, cubanite, molybdenite, sphalerite, galena, scheelite, wolframite, calcite, barite, quartz
  
Other Properties: Diamagnetic (repelled from magnetic fields).

 

Bismuth
Origin: Pohla, Schwarzenberg District, Erzgebirge, Saxony, Germany
Sample size: 1.8 x 1.6 x 0.8 cm
Photo: Rob Lavinsky

 

Bismuth
Bismuth on quartz
Origin: AW mine, Deepwater, New South Wales, Australia
Sample size: 2.5 x 1 x 2.4 cm
Photo: Dan Weinrich

 

Bismuth
(zoom-in of above)

 

Bismuth
Bismuth with molybdenite
Origin: Wolfram Camp, Queensland, Australia
Sample size: 23 x 18 x 43 mm
Photo: Dan Weinrich

 

Bismuth
(zoom-in of above)

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