how are pearls obtained
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A natural pearl begins its life inside an oyster's shell when an intruder, such as a grain of sand or bit of floating food, slips in between one of the two shells of the oyster, a type of mollusk, and the protective layer that covers the mollusk's organs, called the mantle. ... Cultured pearls are made in the same way.
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• Pearls are obtained from the saltwater muscle that develops irritant over time. It is composed of minute crystalline deposits of Calcium carbonate.
• Natural Pearls form when a layer of fluid is coated on an irritant by organisms such as oyster, mussel, or clam as a defense mechanism. lustrous pearls are formed after the deposition of many layers called 'nacre'.
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