Henan Zhongtu Superhard Material Co. Ltd. is located in Zhengzhou City, Henan Province China. After 15 years of development and efforts, the company has developed into a large national enterprise integrating scientific research production and international trading. ,br>brThe company has state-level enterprise technology center> enterprise post-doctoral research station and has a number of core key technologies and independent intellectual property rights. Some of the products have reached the international advanced level and are national high-tech enterprises. The main products of Lab grown diamond series products are popular in Japan, the United States Europe and other developed countries and Southeast Asian markets.,br>brWhat is Lab grown diamond>br