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Cummingtonite

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SER1151660

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Description
Locality: 
I Mondei, Montescheno, Verbano-Cusio-Ossola Province, Piedmont, Italy
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 7 × 6 cm
Largest Crystal: 
6.50cm
Description

a group of light brown cummingtonite crystals on pegmatite 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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Start 02 Dec 18:00
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