Tanghe Technology was found in Xilin Gol League,Inner Mongolia,China.As a high-tech and environment-friendly company, we mainly depend on wind and photovoltaic power to produce our high-purity industrial synthetic diamond and gem-quality lab-grown diamond for customers all over the world.Means we can handle export for you.For rough,we are big and famous grower in China,which is highly admitted by our clients.For polish,we are well known as our cutting technology,we provide various kind of fancy