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Pearl Trivia:Why do oysters make pearls?

Oysters are mollusks with a hard outer shell that covers and protects some of the internal organs. When an invader (such as sand) enters the shell of the oyster and stays between the outer shell and the sleeve, the oyster is stimulated, and the outer shell immediately secretes minerals called mother-of-pearl, enveloping foreign objects.


Pearl Trivia:Why do oysters make pearls?-3trivia
Pearl Trivia:Why do oysters make pearls?

Oysters will always secrete mother-of-pearl until the foreign objects are completely covered. The shiny sphere of pearls is actually the product of the immune response; oyster farmers can make pearls by injecting a grain of sand into the shell of the oyster.

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