1. Jed has a certificate. Generally speaking, when buying jade, there will be two certificates, namely the jade jewelry appraisal certificate and the master certificate. Among them, the jewelry appraisal certificate is implemented by professional institutions and professionals who meet the appraisal qualifications, and it is a public letter proof of the authenticity and attributes of rare precious metals, gems or jewelry products.

2. The authority certificate of jadeite, like diamonds, is an appraisal certificate issued by a national authority to prove whether jadeite is A goods.

3. The certificate first depends on whether the issuing institution is formal. The more authoritative jade appraisal certificate is NGTC/GTC/GDTC/ Jane. NGTC, the abbreviation of "National Jewelry and Jade Quality Supervision and Inspection Center"; GTC, the abbreviation of "Guangdong Jewelry and Precious Metals Testing Center"; GDTC is the abbreviation of "Guangdong Gold and Silver Jewelry Testing Center"; GIYN is "Yunnan Jewelry and Jade Quality Supervision and Inspection Institute".

4. Among these testing institutions, the most authoritative one is NGTC, which belongs to the Jewelry and Jade Jewelry Management Center of the Ministry of Land and Resources and is the maker of Chinese jewelry industry standards. GTC/GDTC/ Jilin belongs to provincial units, that is, provincial jewelry and jade appraisal centers. As for smaller institutions, their authority will be slightly reduced, but as long as the testing process is standardized, it can still be used as a scientific reference.