The ngtc certificate is issued by the Jewelry and Jade Jewelry Management Center of the Ministry of Land and Resources, and gia is issued by the Gemological Institute of the United States. Compared with ngct, gia certified diamonds have better fluidity, better overall evaluation of diamonds, and pay attention to the fire color and cutting of diamonds. Ngtc, on the other hand, pays more attention to the intrinsic quality (clarity) of diamonds.
For a slightly smaller diamond, the diamond after gia inspection will be "degraded" (but not serious) after ngtc inspection. There is almost no difference between diamonds over 50 points.
NGTC, the full name of the National Jewelry and Jade Training Center, belongs to the Jewelry Management Center of the Ministry of Land and Resources, and has long been committed to the promotion and popularization of jewelry vocational education and national jewelry and jade standards. To undertake the professional qualification training of CGC and CPVG of the Ministry of Personnel and the Ministry of Finance, and the professional qualification training of diamond inspectors, gem inspectors, jewelry salesmen and precious metal jewelry craftsmen of the Ministry of Labor and Social Security.
193 1 year, Mr. Robert M.Shipley founded the GIA Gemological Institute in the United States, and GIA was the founder who popularized the diamond appraisal certificate to the international level. GIA is a non-profit organization, and its funds are donated by people in the jewelry industry. Its main service scope is the education and research of jewelry design and professional knowledge, which is deeply recognized by the global jewelry industry. Up to now, GIA has 14 teaching institutions around the world, providing professional courses such as research, sales and appraisal, cultivating high-quality jewelry practitioners, and also contributing to GIA's lofty reputation in the industry, so that the public can always maintain a leading position in the world in terms of trust and professionalism.