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How many carats is a 7.0 mm round cut tanzanite ring?

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asked Jul 5, 2015 by nikkibear2011 (120 points)

1 Answer

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Carat measures the weight of a gemstone, and millimeters measure volume. They are not the same. Digital scales that measure carat weight are fairly inexpensive and can provide an accurate carat weight for any gemstone.
answered Jul 6, 2015 by hershel (51,840 points)