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Rough Ruby, sapphire and Corundum identification measuring hardness using HMKIS diamond tester🔥💎🔥💎
33:13
Rough Ruby, sapphire and Corundum identification measurin…
55.7K viewsMay 3, 2023
YouTubeHappy Lost Souls
Corundum Stone Cutting | Precision Faceting & High Polish Finish #gemstone #925silver #gems #gem
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corundum under blue ultraviolet laser light | Witch Gemstone will glow under ultraviolet light
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corundum under blue ultraviolet laser light | Witch Gemstone will g…
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Digging Sapphire & Ruby Lapidary Grade Corundum North Carolina Gem Hunting 2021
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