Mineral description : Wolframite

Wolframite from Baggetorp.
In the middle of the rock there is a crystal.

Mineral class Sulphates : Crocoit - wulfenite - scheelite group.
Chemical formula (Fe,Mn)WO4
Crystal system Monoclinic.
Habitus Often as thick tabular crystals, but also as massive or foliated aggregates.
Cleavage Perfect with an uneven fracture.
Hardness 4-4.5
Density 6.7-7.5
Color Brownish black.
Streak Dark brown, almost black.
Luster Metallic to adamantine.
Description  
Occurance In hydrothermal veins and in pegmatites.
Associates  
Notes  
Locations A not so common mineral in Sweden.
  • Baggetorp, Tjällmo, Östergötland. Crystals up to a couple of cm can be found at the waste heap.
  • Persgruvan, Riddarhyttan. As aggregates up to 5 cm.

To sulphates index.
Mineral group index.
Main index.

If you have some questions, suggestions or comments you are welcome to write me a line or two.


axelsson@acc.umu.se
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Last changed : 1998-03-07