Sino Jewelry Co.,Ltd: Our pearl factory is the leader of pearl processing factory in China. We own the interna-tional high-class processing technology, craft, and strict control system to ensure the steady quality in color, luster, matching. The pearl processing steps are as follows: Washing - Classifying - Drilling - Bleaching - Polishing. Over twenty years, our high quality pearls have got good reputation from our customers around the world. http://www.sino33.com