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
Description
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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