non precious stones

macjillifer | 11:13 Sat 10th Sep 2005 | Science

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is there a way of telling a non precious stone in jewellry from the real thing

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Hamish

There are also a range of liquids which have specific RI. Put the gem in it and if you cannot see it (given the same colour) it has the same RI. rough but a good 1st test and cheaper than a ri rig

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