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Phengite

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Phengite

Description Tabs

Description
Locality: 
Montaldo Mine, Borgata Oberti, Cuneo Province, Piedmont, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.6 × 2.4 × 1.6 cm
Description

hundreds tiny, red phengite crystals on braunite

Mineral Data
What's on the rock

Phengite

Variety Of: 

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Hardness: 
0.0