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  • Physical properties

        

  • Freshwater and saltwater pearls

        

    Pearls fit into two categories: freshwater and saltwater. As their name implies, freshwater pearls are formed in freshwater mussels that live in lakes, rivers, ponds and other bodies of fresh water. Most freshwater cultured pearls sold today come from China. By contrast, saltwater pearls grow in oys


  • Creation of a pearl

        

    The difference between natural and cultured pearls focuses on whether the pearl was created by nature, without human intervention, or with human aid. Pearls are formed inside the shell of certain bivalve mollusks. As a response to an irritant inside its shell, the mollusk will deposit layers of calcium carbonate (CaCO3) i


  • Natural pearls

        

    Cross section illustration showing natural and cultured pearls.
    Natural pearls are nearly 100% nacre. It is thought that natural pearls form under a set of accidental conditions when a microscopic intruder or pa


  • Cultured pearls

        theoyster, it secretes a few layers of nacre around the outside surface of the implant before it is removed after six months or more. When a nucleated cultured pearl is X-rayed it will reveal a different structure to that of a natural pearl. It exhibits a solid center with no concentric growth rings,compared to a solid center wit


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