Pearl with a mother of pearl bead center. In the cultured pearl industry, the resources used to create a mistaken all nacre baroque pearl is a drain on the production of round cultured pearls. Therefore, they are trying to improve culturing technique so that keshi pearls do not occur. All nacre pearls may one day be limited to natural found pearls. Today many "keshi" pearls are actually intentional, with post-harvest shells returned to the water to regenerate a pearl in the existing pearl sac. Tahitian pearls, frequently referred to as black pearls, are highly valued because of their rarity; the culturing
Daniel Pearl through music. Pearl was born in Princeton, New Jersey to Ruth and Judea Pearl. His mother is of Iraqi-Jewish descent and his father is an Israeli of Polish-Jewish descent. His family moved to the Encino district of Los Angeles, when his father took a position with UCLA. His father, Judea Pearl, is a professor of computer science and statistics, and director of the Cognitive Systems Laboratory at UCLA. He has received the Turing Award. The history of the family and its connections to Israel are described by Judea Pearl in the "LA Times" article, "Roots in the Holy Land". Pearl