Thursday, June 13, 2019

Where do black pearls come from?

How do oysters make pearlsPearls are made by marine oysters and freshwater mussels as a natural defence against an irritant such as a parasite entering their shell or damage to their fragile body. The oyster or mussel slowly secretes layers of aragonite and conchiolin, materials that also make up its shell.

1 comment:

Pearl Necklace said...

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