Oyster Pearls: An Irritating Story - Now. Powered by Northrop Grumman.

Oyster pearls form when an oyster's shell and mantle are irritated. They are among the few gemstones made by living organisms.

Humans have always been amazed with the glinting, sparkling minerals that our Earth produces. But do all shining jewels originate underground? These objects do mostly come from geological processes a… [+4066 chars]

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