Pearl By The Sea

Pearls come from a living sea creature. Most pearls come from oysters either freshwater or saltwater environments.

As oysters grow, an internal organ called the mantle uses minerals from the oyster's food to produce a substance called nacre. Nacre is the material that forms the oyster's shell. When a foreign substance, such as a grain of sand, may find its way into the oyster and get stuck between the mantle and the shell.
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To protect itself, an oyster's natural reaction will be to cover up the irritant layer by layer of nacre. This substance, usually used to create the shell, will instead form a pearl.

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