Producing cultured pearls depends on a surgical procedure called grafting, which entails surgically implanting an artificial nucleus (shell bead) into the tissue of a pearl oyster. The oyster then secretes nacre around the nucleus. Several species of pearl oysters are cultivated for pearl production. For more programmes please visit our website: http://www.greentvindia.com/ You can like us on our facebook page: https://www.facebook.com/greentvindia For suggestions and more info, please write us at: info@greentvindia.com