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Cummingtonite

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SER720276

Cummingtonite

Description Tabs

Description
Locality: 
I Mondei, Montescheno, Valle Antrona, Val d'Ossola, Piedmont, Italy
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2.5 × 0.6 cm
Description

brown elongated crystals on 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
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