Cultured pearl is calcium carbonate and a fibrous protein called conchiolin. As the nacre builds up in layers of minute aragonite tablets, it fills the growing pearl sac and eventually forms a pearl. Natural pearls are formed by nature, more or less by chance. On the other hand, cultured pearls are human creations formed by inserting a tissue graft from a donor oyster, upon which a pearl sac forms, and the inner side precipitates calcium carbonate, in the form of nacre or "mother-of-pearl". The most popular and effective method for creating cultured pearls are made from the shells of freshwater river mussels
Pearl (given name) Doll Company in the United States from the 1950s through the 1970s. The doll was based on a cartoon character created by William Steig. One recently named Pearl, the then two-year-old Pearl McKay, was the star of the 2007 short film "The Landlord". Pearl Bailey was an American singer and actress. Pearl Richards Craigie was an Anglo-American novelist and dramatist, who wrote under the pen-name John Oliver Hobbes. Pearl Aday was an American singer-songwriter. Pearl Fryar has a topiary garden described in the documentary film "A Man Named Pearl". Pearl is one of the two members of the fictional band