Study on the Formation Mechanism and Basic Characteristics of Pearl

Pearl is an ancient organic gem with unique beauty, and has been treated as a treasure since times. From scientific point of view, pearls are produced in the bodies Pteria  and Pinctada  molluscs. The rich color diverse shape, formed by accumulation calcium carbonate (CaCO 3 ) containing minerals (aragonite) beads endocrine. This paper summarizes biological characteristics formation mechanism pearl during its growth development; chemical composition, activity internal external causes clarified to reveal their physiological biochemical pearls;   main components analyzed provide basis for improving quality cultured China follow-up research development new composite materials.