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Corundum

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CR873027

Corundum

Classic Locality

Description Tabs

Description
Locality: 
Ilmen Mountains, Chelyabinsk Oblast, Russian Federation
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 4 × 3.8 cm
Largest Crystal: 
3.50cm
Description

Very large buish-grey corundum crystal cluster from a very old collection.

 

Mineral Data
What's on the rock

Corundum

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