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
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",