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  • What is the difference between a cultured pearl and a natural pearl?

    刺激物 贻贝 软组织

    Questioner:Isabella Carter 2018-06-15 00:14:27
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  • Oliver Rivera——Works at the International Criminal Court, Lives in The Hague, Netherlands.

    Cultured Pearls Versus Natural Pearls. A Natural Pearl is formed when an irritant accidentally gets into the soft tissue of the mussel in an oyster. As a defense mechanism, the animal produces secretions to coat the irritant. Many layers of coating are deposited on the irritant making the irritant smooth.read more >>

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