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Phlogopite

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Phlogopite

Ex-David J. Eicher Collection; ex-John H. Eicher Collection

Description Tabs

Description
Locality: 
Bancroft Area, Ontario, Canada
Size Range: 
Cabinet (10-18 cm)
Size: 
12.8 × 3.5 × 0.4 cm
Description

Stacked plates of black phlogopite with glassy luster from a classic locality, in the shape of a knife blade. Unusual old time specimen.

Mineral Data
What's on the rock

Phlogopite

Formula: 
KMg3(AlSi3O10)(OH,F)2
Strunz: 
9.EC.20
Crystal System: 
Monoclinic - Prismatic
Hardness: 
2.0 - 3.0
Streak: 
White
David J. Eicher

Seller Information

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