I could use some help identifying this stone. it's a little harder then amethyst with my diamond tester, 2.95 CT, with one small inclusion that is not a scratch. not fluorescent. I

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I could use some help identifying this stone. it's a little harder then amethyst with my diamond tester, 2.95 CT, with one small inclusion that is not a scratch. not fluorescent. I

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Solved A. Mohs scale (Relative hardness) Diamond 10 Corundum