Chang Jiang Gems Ind Co., Ltd, established in 1994, which is authorized to import &export, is a largest professional gemstone manufacturer in Asia. With more than 8000 employees working & 7000 sets of equipment in 13 branch factories located respectively in the province of Hunan, Guangdong, Hunan, Sichuan, Changing, Shania, etc. Our factories have a monthly production capacity of 20 million pieces of stone.