Corundum: Mineral information, data and localities.
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Corundum: The mineral Corundum, Sapphire, Ruby info & pictures
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Corundum: The mineral Corundum, Sapphire, Ruby info & pictures
What is corundum and what are its basic qualities?
Corundum: Use as a Gemstone, Abrasive, Refractory
Corundum: Use as a Gemstone, Abrasive, Refractory
What is corundum and what are its basic qualities?
Rock Collection
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Corundum - Wikipedia
Corundum - Minerals Education Coalition
