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Tuesday, February 26, 2019
Are black pearls real?
Black cultured pearls from the black pearl oyster – Pinctada margaritifera – are not South Sea pearls, although they are often mistakenly described as black South Sea pearls. In the absence of an official definition for the pearl from the blackoyster, these pearls are usually referred to as "black pearls".
Why are black pearls so important to Tahiti and 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.
A cultured pearl is a pearl created by an oyster farmer under controlled conditions.Cultured pearls can be farmed using two very different groups of bivalve mollusk: the freshwater river mussels, and the saltwater pearl oysters.
Cultured freshwater pearls are pearls that are farmed and created usingfreshwater mussels. These pearls are produced in Japan and the United States on a limited scale, but are now almost exclusively produced in China.
Production. Majorica pearls are not formed in mollusks, but are man-made on solid glass balls coated with layers of pigmented and protective lacquers. They begin from high density dull glass with a specific weight, similar to that of real pearls.
Just like the shell of a mollusk, a pearl is composed of calcium carbonate (mainly aragonite or a mixture of aragonite and calcite) in minute crystalline form, which has been deposited in concentric layers. The ideal pearl is perfectly round and smooth, but many other shapes, known as baroque pearls, can occur.