Mineral description : Schefferite

Schefferite with veins of magnetite.
From Långban. Schefferite with calcite and hematite.
From Långban.

Mineral class Silicates : Inosilicates : Diopside - Augite group.

Chemical formula Ca(Mn,Mg,Fe)(Si₂O₆)

Crystal system Monoclinic.

Habitus As small pyramidal or tabular crystals. Often as fine grained dense masses.

Cleavage Perfect in two directions with 90 degrees angle between the surfaces.

Hardness 5.5-6.5

Density 3.2-3.3

Color Dark brown, light brown, reddish brown to yellowish brown.

Streak

Luster Vitreous.

Description

Occurance In manganeese rich contact metamorphic scarns.

Associates

Notes

Locations A less common pyroxene mineral with a couple of good localities in Sweden.

Långban, Värmland. Commonly as fine grained dark brown to light brown masses. Also as sharp dark reddish brown crystals in dolomite and calcite filled cavities.
Harstigen, Jakobsberg, Pajsberg and Sjögruvan, Värmland. Relatively common.

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Last changed : 1998-08-23

Mineral class	Silicates : Inosilicates : Diopside - Augite group.
Chemical formula	Ca(Mn,Mg,Fe)(Si₂O₆)
Crystal system	Monoclinic.
Habitus	As small pyramidal or tabular crystals. Often as fine grained dense masses.
Cleavage	Perfect in two directions with 90 degrees angle between the surfaces.
Hardness	5.5-6.5
Density	3.2-3.3
Color	Dark brown, light brown, reddish brown to yellowish brown.
Streak
Luster	Vitreous.
Description
Occurance	In manganeese rich contact metamorphic scarns.
Associates
Notes
Locations	A less common pyroxene mineral with a couple of good localities in Sweden. Långban, Värmland. Commonly as fine grained dark brown to light brown masses. Also as sharp dark reddish brown crystals in dolomite and calcite filled cavities. Harstigen, Jakobsberg, Pajsberg and Sjögruvan, Värmland. Relatively common.