Shenzhen S & M Shell Crafts Co., Ltd, established in 1989, is specialized in producing shell nuclei which are used for pearl cultivation. With nearly 20 years development, the original small home workshop has developed into a professional nucleus factory including over 100 skillful workers and advanced machines. Our MOP shell nucleus made from Tahiti Mother of Pearl Shells (Pinctada Margaritifera) are quite popular and has received a good reputation due to the good quality.