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Mining Waste Of Mineral Sapphire

Sep 29 2017nbsp018332The Most Important Uses of the Mineral Sapphire CONTRIBUTING WRITER 29 SEP 2017 CLASS Sapphires are in the nonred corundum category of minerals and are considered the second hardest mineral on the Mohs scale Sapphires are aluminum oxides that can be found naturally or can be manufactured Although the importance of the sapphire as a mineral

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