Is the spring of China's gem grade diamond cultivation coming?

Laboratory and natural mines "on an equal footing": is the spring of China's gem grade diamond cultivation coming?

2020-10-19

New opportunities for colored gemstones-- laser crystal colored gemstones appears in jewelry exhibition

Human beings have been cultivating gemstones in the laboratory for more than 100 years. At the beginning of last century, Werner Ye created the flame melting method and cultivated gemstones such as red sapphire.

2019-04-25