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Birinchidan, what is a diamond certificate?
Generally issued by the National Jewelry and Jade Quality Supervision and Inspection Center. And it is also the most authoritative and top-level appraisal issued by the Gemological Institute of America (Oila).
We should note that diamonds below 20 points generally not equipped with a monitoring certificate.
Ikkinchidan, what are the common diamond identification certificates?
International Gemological Institute IGI, currently the world’s largest independent jewellery identification laboratory, located in Belgium and known by the diamond industry as “the authoritative laboratory next to consumers”.
American Gemological Institute GIA, every diamond ring after 2000 can be searched online. Compared with diamond appraisal agencies of the same level, GIA approved diamonds are expensive. And the diamonds they identify have reached 95% butun dunyo bo'ylab, Worth consumers to rely on.
The HRD of the Belgian Diamond High Council, the diamonds identified by it are cheaper than those certified by the GIA appraisal agency. If you are not so concerned about the cut of the diamond ring, you can choose to buy them at a store with an HRD certificate.
European Gemological Institute EGL, EGL’s customers are mainly professional wholesalers, retailers and cutting factories.
NGTC diamond appraisal certificate. The NGTC certificate issued by the National Jewelry and Jade Quality Supervision and Inspection Center. It is the authority in China’s jewelry and jade testing. Although the diamond grading system used in the national inspection certificate also follows international standards, but Some aspects will be stricter.
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