Mineral description : Hedenbergite

Hedenbergite from Långban.
As small black crystals in lower middle and upper right corner.

Mineral class Silicates : Inosilicates : Diopside - Augite group.
Chemical formula CaFe(Si2O6)
Crystal system Monoclinic.
Habitus Well developed prismatic crystals with square or octaedric cross section. Also as radiating or coarse aggregates.
Cleavage Perfect, two planes in 87 degrees angle.
Hardness 5.5-6
Density 3.5-3.6
Color Dark green to black.
Streak Light grayish green.
Luster Vitreous.
Occurance Created in contact metamorphic scarn with magnetite.
Associates Magnetite
Locations A common mineral in many sulphide and iron mines in central Sweden.
  • Nordmark mines, Värmland. As good crystal groups.
  • Långban, Värmland.
  • Yxsjöberg scheelite mine, Västmanland. As brownish black aggregates.

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Last changed : 1998-03-07