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Corundum: Use as a Gemstone, Abrasive, Refractory
Corundum: Mineral information, data and localities.
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Corundum Value, Price, and Jewelry Information
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Corundum Gemstone: Properties, Meanings, Value & More | Gem Rock Auctions
Corundum - Wikipedia
Sapphire (corundum) | Blue corundum (sapphire) (~5.0 centime… | Flickr
Corundum - Wikipedia
Corundum var. Sapphire with Calcite - LB-545 - Gwebin - Mandalay Region Mineral Specimen
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Corundum: Mineral information, data and localities.
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100g Natural Blue Sapphire Blue Corundum Raw Untreated Crystal Mineral Specimen | eBay
Corundum: Use as a Gemstone, Abrasive, Refractory
9 Pieces of Green Blue Corundum Sapphire Prisms
Corundum: The mineral Corundum, Sapphire, Ruby info & pictures
