A diamond certificate, or diamond report, is issued once a diamond has been graded by an accredited independent gemological laboratory. It is important to note that a certificate from a laboratory is not an appraisal. Unlike an appraisal, a certificate will not attribute a monetary value to your stone, but instead establish the core characteristics and grading’s of your diamond. These facts will be the foundation on which a diamond buyer would price your stone based on the current second hand market.
Whether buying or selling a diamond, it is always beneficial to have a certificate issued by a trusted laboratory that details all of the specifics of your stone.
What will I find on my diamond certificate?
A diamond certificate documents all of the grading’s of your diamond, including the 4 C’s: carat weight, color, cut and clarity grade. While each laboratory issues different certificates with different levels of information, most also include: polish, symmetry, fluorescence, and a graphical depiction of the diamond and its inclusions. You will want to choose the right gemological laboratory to evaluate your diamond.
Which laboratory should I choose?
If you are in the position of choosing a laboratory to grade your diamond, we always recommend that you entrust your diamond to the GIA. They are the gold standard and most respected laboratory in the diamond industry, with highly accurate and consistent grading standards.
If you have a diamond that has been graded by any laboratory other than the GIA, this is still useful and relevant information, but do bear in mind that the grading’s are likely to be off by a grade or two.
The most popular gemological laboratories:
GIA: Gemological Institute of America
AGS: American Gem Society
HRD: The Hoge Raad voor Diamant, translated as the “Diamond High Council”
IGI: International Gemological Institute
EGL: European Gemological Laboratory