Cultured pearl Cultured pearl 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. A pearl is formed when the mantle tissue is injured by a parasite, an attack of a fish or another event that damages the external fragile rim of the shell of a mollusk shell bivalve or gastropod. In response, the mantle tissue of the mollusk secretes nacre into the pearl sac, a cyst that forms during the healing process. Chemically speaking, this
Daniel Pearl On December 10, 2007, President George W. Bush and Laura Bush invited Ruth and Judea Pearl, parents of Daniel Pearl, to the White House Chanukah reception. They lighted the Pearl family menorah that once belonged to Daniel's great-grandparents, Chaim and Rosa Pearl, who brought it with them when they moved from Poland to Israel in 1924. There they helped establish the town of Bnai-Brak. The late former mayor of New York City Ed Koch requested that his own tombstone be inscribed with Pearl's words: "My father is Jewish, my mother is Jewish, I am Jewish." Shortly after Pearl's death, his