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how to do scratch test on light blue sapphire found in eldorado mine montana

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asked Jun 20, 2016 by beccaisfirst (120 points)

1 Answer

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Sapphire is harder than virtually any other mineral except for diamond, so you can test to see if it scratches other hard minerals like beryl or topaz. See if you can get a piece of these minerals that you don't mind scratching.
answered Jul 24, 2016 by hershel (52,620 points)