A method of culturing a pearl using a mollusk having mantle tissue that includes placing a first portion of a nucleus adjacent to the mantle tissue and allowing the mollusk to deposit nacre on this first portion of the nucleus; and repositioning the nucleus so a second portion of the nucleus is adjacent...http://www.google.fr/patents/US7404378?utm_source=gb-gplus-shareBrevet US7404378 - Pearl culture method and product
