The National Jewelry and Jade Quality Supervision and Inspection Center, also known as National Inspection (NGTC), is a national-level jewelry and jade quality inspection institution authorized by the General Administration of Quality Supervision, Inspection and Quarantine according to law, and is the authoritative organization for jewelry and jade inspection in China.

To check the authenticity of the certificate issued by the National Jewellery and Jade Supervision and Inspection Center (NGTC), you only need to enter two parameters, namely "certificate number" and "anti-counterfeiting code" on the 360 Jewelry Guard. Please pay attention to the case-sensitive input. If there is a "-"sign in the certificate number, you must enter it and use the keyboard to subtract it.

360 Jewelry Guard supports four types of NGTC certificates: jewelry and jade jewelry appraisal certificate, inlaid diamond grading certificate, precious metal jewelry purity appraisal certificate and diamond grading certificate.

Query certificate range

Ⅰ.NGTC can only query card certificates issued after 2004 10 and paper certificates issued after 2005 10;

Two. Please try again in a few days if you inquire about the certificate issued last month. It will take some time for the new certificate to be uploaded to the database.

If the re-inquiry does not solve the problem, please contact NGTC by phone.