There are three types of diamond ring certificates: GIA Certificate, NGTC Certificate and IGI certificate. The certificate contains the total weight of the diamond ring, the material of the ring and the shape, weight (carat CT), color, clarity, cut and number of the diamond. There are anti-counterfeiting codes in the certificate, you can go to the official website to check the authenticity of the certificate.
There are three types of diamond ring certificates on the market: GIA certificate, NGTC certificate and IGI certificate. The GIA certificate is a diamond grading certificate issued by the Gemological Institute of America, which is the most recognized and authoritative certificate in the world.
NGTC certificate, the full name of the National Inspection and Appraisal Center, is a national-level professional quality inspection institution for jewelry and jade authorized by the relevant competent authorities in accordance with the law, and is also an authoritative institution for the detection of jewelry and jade in China, mainly for the identification of finished diamond rings.
The IGI Certificate is the oldest gemological institute in Belgium and the largest jewellery appraisal institution in the world.
The content of these diamond ring certificates is much the same, mainly to record the 4c standards of the diamond ring, namely: weight (carat CT), color, clarity, cut; The shape and size of the diamond, the number of the diamond and the total weight of the ring and the material of the ring are also included.
It is worth noting that since the GIA certificate and IGI certificate are the certificates of the International Gemological Institute, they are all in English, while the NGTC certificate is in Chinese. There are anti-counterfeiting codes on each certificate, and the authenticity of the diamond ring certificate can be queried on the corresponding official website according to the type of certificate.