Zsjc diamond certificate is not authoritative enough. Zsjc diamond certificate is issued by Shenzhen Zhonghe Jewelry Testing Co., Ltd., which belongs to the provincial diamond appraisal certificate. Judging from the gold content of the certificate, the certificate is not fake, but it is not authoritative enough. Compared with the national level, it is not so strict. For consumers, this certificate has a drawback. Where there is no strict standard in the national standard, water will still be released.