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Biro Bela
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2024-11-24 11:48:28

Biro Bela on Nostr: Pearls are made by marine oysters and freshwater mussels as a natural defence against ...

Pearls are made by marine oysters and freshwater mussels as a natural defence against an irritant such as a parasite, secreting layers of aragonite and conchiolin which in turn creates "mother of pearl" which encases the irritant.
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