The GIA Diamond Grading Certificate is the most authoritative diamond identification certificate in the industry. We know that there are two kinds of GIA diamond certificates, one is the GIA Diamond Grading Report used for diamonds over one carat, and the other is issued for one carat or less. GIA Diamond Dossier, the difference between the two certificates is that the certificate below one carat is relatively small and the diamond inclusions are not drawn. So, how do you determine if the diamond and the certificate match?
How to determine the consistency of diamonds and certificates? There are three main methods:
First, the laser code.
GIA diamonds below one carat will be laser engraved with the certificate number on the diamond waistline, which is often referred to as the “laser codeâ€, which allows the operator and the consumer to identify whether the diamond is the same one identified by the certificate.
Second, the weight of the diamond.
If it is more than one carat, it will not necessarily engrave the certificate number on the waist of the diamond. At this time, it is necessary to identify whether the diamond is the same as the certificate, according to whether the content of the certificate matches the diamond. The method is to confirm whether the weight of the diamond matches the certificate, because the weight of the diamond indicated by the certificate is very accurate, even if the diamond of the same grade is not the same weight as the certificate.
Third, inclusions.
Since it is impossible to have two diamonds with exactly the same connotation status, a more reliable way is to determine the correspondence between the physical object and the certificate by comparing the actual contents of the diamond with the contents indicated in the certificate. This requires professional equipment (high magnification magnifier) ​​and certain expertise. You can ask your trusted appraiser to do this step to confirm that it is the best.
In order to give consumers more confidence in the GIA certificate, here are the key points to confirm the GIA certificate:
1. The barcode and number of this part can be found by GIA.
2. The laser engraving on the waistline of the diamond and the word "GIA" must match the certificate.
3, GIA special ink light blue diamond base map block.
4. The straight part of the area is printed by high-tech equipment. The English letters must be visible when enlarged.
5. GIA exclusive laser anti-counterfeiting logo.
How to determine which diamond is represented on the GIA certificate? The above is the five points for determining the GIA grading certificate. I hope consumers pay more attention.
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