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Cummingtonite

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ESM544138

Cummingtonite

Description Tabs

Description
Locality: 
Aurora Mine, Kaveltorp, Kopparberg, Ljusnarsberg, Örebro County, Sweden
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.8 × 3.7 × 2.7 cm
Description

Fibrious cummingtonite crystals

Mineral Data
What's on the rock

Cummingtonite

Formula: 
☐{Mg2}{Mg5}(Si8O22)(OH)2
Strunz: 
9.DE.05
Crystal System: 
Monoclinic
Hardness: 
5.0 - 6.0
Streak: 
nd