Mineral description : Gedrite

Gedrite from Schisshyttan.

A 5 cm gedrite crystal aggregate from Schisshyttan.

Mineral class	Silicates : Inosilicates : Cummingtonite - Anthophyllite group.
Chemical formula	(Mg,Fe)6Al(OH/(Al,Si)Si3O11)2 (Mineral i Sverige) or (Mg,Fe)5Al2(Si6Al2)O22(OH)2 (Athena mineralogy)
Crystal system	Orthorombic.
Habitus	As radiating groups of crystals in metamorphic rocks.
Cleavage
Hardness	5-6
Density	3.1-3.7
Color	Grayish black to dark green.
Streak
Luster
Description
Occurance	In metamorphic rocks.
Associates
Notes
Locations	Schisshyttan, Ludvika. As black radiating stars in metamorph rock. Dammgruvan, Västra silvberg mining district, Ludvika.

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