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What Is Mother of Pearl?


Pearl shell
John Clutterbuck/Photodisc/Getty Images
Definition: Mother of pearl is the common name for iridescent nacre, a blend of minerals that are secreted by oysters and other mollusks and deposited inside their shells, coating and protecting their bodies from parasites and foreign objects.

A pearl grows when mother of pearl surrounds and builds layers around an object that's inserted in she shell by nature or humans.


Also Known As: nacre, MOP
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