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Blue Corundum Mineral Form Tanzania. Corundum is Gem Varieties, Ruby and Sapphire. Stock Image - Image of iron, mineral: 211828395
Corundum - Wikipedia
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What is corundum and what are its basic qualities?
Sapphire (corundum) | Blue corundum (sapphire) (~5.0 centime… | Flickr
Corundum: The mineral Corundum, Sapphire, Ruby info & pictures
Corundum - Wikipedia
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Corundum: Mineral information, data and localities.
Corundum - Minerals Education Coalition
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1,500+ Corundum Stock Photos, Pictures & Royalty-Free Images - iStock | Topaz, Ruby, Calcite
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What is corundum and what are its basic qualities?
Corundum var. Sapphire with Calcite - LB-545 - Gwebin - Mandalay Region Mineral Specimen
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