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Cummingtonite

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SHS114838

Cummingtonite

Description Tabs

Description
Locality: 
Stollberg Mine, Väster Silvberg, Smedjebacken, Dalarna County, Sweden
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.1 × 2 × 2 cm
Description

Magnesiocummingtonite in matrix

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