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
Pearl: The Best Collection Pearl: The Best Collection Pearl: The Best Collection (stylised as pearl ～The Best Collection～) is Kokia's first greatest hits album, released on February 1, 2006. It was released simultaneously with her first video clips collection, "". The album featured material from her time with Mother Land management under Victor Entertainment (2003-2006). In this time, Kokia had released two albums ("Remember Me" and "Uta ga Chikara"), along with seven singles. After working with Mother Land, she set up her own personal management company, Anco & Co., and has worked with them ever since. Three singles were released after "Uta ga Chikara",