Mineral description : Andradite

Andradite from velfjorden, Norway. Massive and 12mm xx to the right.

Chemical formula :	Ca3Fe2[SiO4]3
Hardness :	6.5-7.5
Density :	3.75
Color :	Usually black, but also red, brown, yellow and green.
Crystal form :	Cubic. Usually rombdodecaedric or ikosatetraedric crystals.
Luster :	glas.
Habitat :	Occurs only in contact metamorphic carbonatic rocks, or in carbonatic oxidised scarn.
Associates :	.
Notes :	Glows when heated (see Grossular ).
Locations :	Yxsjöberg mine, Örebro län. Red crystals with scheelite, hedenbergite... Stripåsen copper mine, Norberg. Lots of dark brown crystals. Lindbo carbonatic quarry, Västanfors, Västmanland. Big black rombododekaedric crystals. Körbergets carbonatic quarry and Penninge mine, Hofors. Lots of black crystals in calcite. In carbonatic quarrys around Skinskatteberg.

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