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Corundum - Wikipedia

Corundum is a crystalline form of aluminium oxide (Al 2O 3) typically containing traces of iron, ... Corundum for abrasives is mined in Zimbabwe, Russia, Sri Lanka, and India. Historically it was mi...

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Corundum Value, Price, and Jewelry Information

Everything you ever wanted to know about corundum. Find value ... CORUNDUM: Star ruby, Sri Lanka (2.75), Burma (2.6, 0.62), India (8.4). Photo © Joel E.

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Indian Ruby Mining | Gems & Gemology - GIA

An overview of ruby mining in the southern Indian states of Tamil Nadu and Karnataka. ... Bottom right: A corundum granulite showing ruby with blue and pink...

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India - The Corunduminium

Their origin was somewhere in Karnataka, but because the Indian ... It is probably massive corundum in the center, with recrystallization on the surface causing...

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Corundum as a Gemstone: Ruby and Sapphire from India

"Rock of the Month # 14, posted for August 2002" a trio of colourful examples of corundum, Al2O3 --- a simple oxide responsible for two of the "big three"...

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