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Corundum

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FXM194685

Corundum

Description Tabs

Description
Locality: 
Bozeman Corundum Mine, Gallatin Gateway, Galatin County, Montana, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 4.5 × 3 cm
Largest Crystal: 
1.50cm
Description

Well formed blue-gray doubly terminated crystal on feldspar-biotite matrix. Excellent old specimen.

Mineral Data
What's on the rock

Corundum

Formula: 
Al2O3
Strunz: 
4.CB.05
Crystal System: 
Trigonal
Hardness: 
9.0
Streak: 
White
Foxminer

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