Nucleu-grafted freshwater pearls have made their debut since 2000. This breakthrough and innovations have been made by Mr Xie Shaohe, professor and chief executive officer of Pearl Research School of Guangdong Ocean University after their strong faith and great efforts. Nucleus-grafted freshwater pearls have similar characteristics as Akoya pearls. Round shape, shining luster, clean surface, blemishless for human eyesight. Sizes: 6-7mm,7-7.5mm, 7.5-8mm;8-8.5mm;8.5-9mm,9-9.5mm ;9.5-10mm;10-10.5mm;10.5-11mm;11.5-12mm . Grade AAA, Grade AAAA. Color:White,Cream,purM