Generally, a nature pearl forms when a piece of sand, work its way into a particular species of oyster. But more than ever, there are other irritant enter the shellfishes, and stimulate them to secrete a fluid to coat the irritant, layer upon layer until a lustrous pearl is formed. With the development of seeding technology, the irritant is surgically implanted into piece of shell called mother pear. The chief process to culturing pearl is to culture special oyster for generating pearls. Basi...