Sapphire, Large Doubly-terminated Crystal, Sri Lanka
A large doubly-terminated very pale blue crystal of gemmy Sapphire from Sri Lanka.
Sapphire is aluminum oxide, with a formula of Al2O3. The name Corundum is from
kuruntam, a Tamil word derived from Sanskrit.
Measures 1 1/4 x 1/2 x 1/2 inches.
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