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Collect information about how a natural pearl is f...
1.
Collect information about how a natural pearl is formed.
Answer»
Natural pearls form when an irritant- usually a parasite and not the proverbial grain of sand – works its way into an oyster, mussel, or clam.
As a defense mechanism, a fluid is used to coat the irritant.
Layer upon layer of this coating called ‘nacre’ is deposited until a pearl is formed.
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