Pearl human intervention. They are quite small, typically only a few millimeters. Keshi pearls are produced by many different types of marine mollusks and freshwater mussels in China. Keshi pearls are actually a mistake in the cultured pearl seeding process. In seeding the cultured pearl, a piece of mantle muscle from a sacrificed oyster is placed with a bead of mother of pearl within the oyster. If the piece of mantle should slip off the bead, a pearl forms of baroque shape about the mantle piece which is entirely nacre. Therefore, a Keshi pearl could be considered superior to cultured pearls
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",