Mineral description : Bismuth

Mineral class Elements : Arsenic-bismuth group
Chemical formula Bi
Crystal system Hexagonal
Habitus Usually as lamellar masses and aggregates.
Cleavage Brittle but cuttable.
Hardness 2-2.5
Density 9.7-9.8
Color Lead grey, bronce to silvery white, With weak reddish tarnish.
Streak Gray.
Luster Strongly metallic
Occurance In pegmatites and hydrothermal veins.
Associates Pegmatites : with tin and wolfram minerals.
Hydrothermal : with bismuth-, cobalt- and nickel minerals.
Notes Easily dissolved in nitric acid.
The only mineral with paramagnetism, weakly repelled by a magnet.
Locations A rare mineral for Sweden.
  • Långban, Värmland. As small grains together with hydrocerrusite and calcite.
  • Åskagen quartz quarry, Värmland. Together with bismut sulphide in quartz.
  • Los, Hälsingland.
  • Håkansboda, Västmanland.
  • Skellefte field. Microscopic.

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Last changed : 1998-03-07