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2. Baroque pearl - Wikipedia

   en.wikipedia.org/wiki/Baroque_pearl

   Cultured freshwater pearls are affordable and lend themselves well to various pearl jewelry designs. Pearl jewelry stores may bleach or dye freshwater cultured pearls after harvesting to enhance their color. The most valuable baroque pearls are the South Sea and the Tahitian pearls, which are produced by Pinctada margaritifera (black-lipped ...

3. Tahitian pearl - Wikipedia

   en.wikipedia.org/wiki/Tahitian_pearl

   Tahitian pearl. Tahitian pearls in bulk. The Tahitian pearl (or black pearl) is an organic gem formed from the black lip oyster ( Pinctada margaritifera ). [1] These pearls derive their name from the fact that they are primarily cultivated around the islands of French Polynesia, around Tahiti. [2]

4. Cultured freshwater pearls - Wikipedia

   en.wikipedia.org/wiki/Cultured_freshwater_pearls

   Cultured freshwater pearls. A bead crochet necklace made from crochet lace, sterling silver, and freshwater pearls. Cultured freshwater pearls are pearls that are farmed and created using freshwater mussels. These pearls are produced in Japan and the United States on a limited scale, but are now almost exclusively produced in China.

5. Cultured pearl - Wikipedia

   en.wikipedia.org/wiki/Cultured_pearl

   Cultured pearl. Cultured pearls are pearls which are formed within a cultured pearl sac with human intervention in the interior of productive living molluscs in a variety of conditions depending upon the mollusc and the goals. [1] Having the same material as natural pearls, cultured pearls can be cultivated in seawater or freshwater bodies.

6. Gallstone - Wikipedia

   en.wikipedia.org/wiki/Gallstone

   A gallstone is a stone formed within the gallbladder from precipitated bile components. [2] The term cholelithiasis may refer to the presence of gallstones or to any disease caused by gallstones, [5] and choledocholithiasis refers to the presence of migrated gallstones within bile ducts . Most people with gallstones (about 80%) are asymptomatic ...

7. Pearl - Wikipedia

   en.wikipedia.org/wiki/Pearl

   Georgian seed pearl gold ring. A pearl is a hard, glistening object produced within the soft tissue (specifically the mantle) of a living shelled mollusk or another animal, such as fossil conulariids. Just like the shell of a mollusk, a pearl is composed of calcium carbonate (mainly aragonite or a mixture of aragonite and calcite) [3] in minute ...