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Tahitian Pearl Hardness
The surface quality of a Tahitian pearl is relatively soft, rating about a 4 on the Mohs scale. (Soapstone rates a 1 as the softest, while diamonds rate a 10 as the hardest.) This means that a sharp object can mark the surface, while a fingernail cannot.
Last edited by pearleducation; 07-25-2011 at 08:34 AM.
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