  Corundum (aluminum oxide).
Description from the source:
Corundum (Al2O3 trig.), India. Partially levigated to highlight the cat's-eye effect. Purple-bluish color, very nice. 4x3x2 cm; 57 g.
Source: Simone Citon
Contributor: John Gray
Acquired: 26 September, 2008
Text Updated: 28 September, 2008
Price: Trade
Size: 1.6"
Composition: Al2O3
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