How are pearls formed?
Pearls are produced by oysters and mussels in response to irritation. When a piece of grit (gravel or sand) gets between the oyster’s shell and its skin (mantle), natural pearls are formed. This happens when tissues surround the grit to produce mother-of-pearl layers. Pearls are artificially produced by inserting particles into the clam.
Friday, January 4, 2008
How are pearls formed?
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