NGTC certificate (not nctc certificate) can be forged, but it can identify the authenticity, just as RMB can be forged, but RMB can also be identified. When authenticating the certificate, the parties can verify the authenticity through their own websites.

NGTC, the full name of National Jewelry and Jade Training Center, belongs to the Jewelry Management Center of the Ministry of Land and Resources, and is engaged in jewelry vocational education and the popularization of national jewelry and jade standards. To undertake the professional qualification training of CGC and CPVG registered by the Ministry of Personnel and the Ministry of Finance, as well as the professional qualification training of diamond inspectors, gem inspectors, jewelry salesmen and precious metal jewelry craftsmen of the Ministry of Labor and Social Security.

The National Jewelry and Jade Quality Supervision and Inspection Center is a legally authorized jewelry and jade quality inspection institution, which has passed the metrological certification, authorization and accreditation of the national product quality supervision and inspection institution and the laboratory accreditation of ISO/IEC 17025. And was designated as the national scientific and technological achievements testing and appraisal institution, import and export commodity inspection laboratory, and designated commodity laboratory of China Consumers Association.