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
The Thirteenth Pearl go to Japan. They finally kidnap her and her boyfriend, Ned when they return to River Heights. Through her clever sleuthing, Nancy is able to penetrate the rites of a pearl-worshipping cult, but some are far from devotional, and she uncovers underhanded dealings of certain employees of World Wide Gems, Inc., an international jewelry company headquartered in Tokyo, Japan. The Thirteenth Pearl The Thirteenth Pearl is the fifty-sixth volume in the Nancy Drew Mystery Stories series. It was first published in 1979 under the pseudonym Carolyn Keene. The actual author was ghostwriter Harriet Stratemeyer Adams. "The Thirteenth Pearl" is the