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 Rivers Pearl Rivers Eliza Jane Nicholson (formerly Holbrook; née Poitevent; March 11, 1843 – February 15, 1896), who wrote under the "nom de plume" Pearl Rivers, was a United States journalist and poet. She took the name from the Pearl River near her home in Mississippi. Eliza Jane Poitevent was born in Gainesville, Hancock, Mississippi, USA, on March 11, 1843 (some sources say 1849). She was the third child of a prosperous family of five, with a busy father and a sickly mother. She is listed on the 1850 U.S. Census as living in Beat 2 of Hancock County, Mississippi, with