Where do black pearls come from?

What do oysters do with pearls?

How do oysters make pearls? Pearls 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.

How do oysters make pearls? | Natural History Museum

https://www.nhm.ac.uk/discover/quick-questions/how-do-oysters-make-pearls.html

How do oysters make pearls? Pearls 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.

How do oysters make pearls? | Natural History Museum

https://www.nhm.ac.uk/discover/quick-questions/how-do-oysters-make-pearls.html

Why do oysters have pearls?

In order to protect itself from irritation, the oyster will quickly begin covering the uninvited visitor with layers of nacre — the mineral substance that fashions the mollusk's shells. Layer upon layer of nacre, also known as mother-of-pearl, coat the grain of sand until the iridescent gem is formed.Nov 20, 2012

How Do Oysters Make Pearls? - Live Science

https://www.livescience.com/32289-how-do-oysters-make-pearls.html

Where do black pearls come from?

French Polynesia

The Tahitian pearl (or black pearl) is an organic gem formed from the black lip oyster (Pinctada margaritifera). These pearls derive their name from the fact that they are primarily cultivated around the islands of French Polynesia, around Tahiti.

Tahitian pearl - Wikipedia

https://en.wikipedia.org/wiki/Tahitian_pearl