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, Mississippi franchise by the City of Pearl for cable television to be installed was granted on July 6, 1976. The Pearl Chamber of Commerce was formed on August 24, 1978. On October 1, 1997, Luke Woodham went on a shooting spree that ended at Pearl High School, killing two and injuring seven, after earlier stabbing his mother to death. Over the years the city has redeveloped the former Pearl High School into City Hall, including the Pearl Police Department, public works departments, and city courts. A large auditorium-style Community Center was built next door. Its clock tower is inscribed with the