Igi certificate is not used to cultivate diamonds. Igi does not specifically identify artificially cultivated diamonds, but it also identifies natural jewelry. IGI is an international gemological institute and the first diamond planting institution in the world to obtain ISO certification. However, it is not necessarily cultivated diamonds that have igi certificates. It can only be said that the certificate of diamond planting is mainly igi, depending on the label of IGI. "Natural diamonds" are natural diamonds, and "laboratory-grown" diamonds are artificially cultivated.