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Diamond grading reports

Diamond grading reports, or diamond certificates as they are often called, are documents prepared by independent, certified gemologists working in properly equipped laboratories, which describe the specific characteristics of a diamond. Typically, a diamond grading report gives a description of the diamond’s four C’s, as well as a plotted diagram of the stone and a description of its shape, including exact measurements, proportions and depth percentages.
It should also comment fluorescence and any imperfections in the diamond. A grading report does not include an appraisal of the value of the diamond. There are a large number of organizations and individuals offering grading reports. We advise the consumer to consider his or her choice carefully.

They should take into account the reputation of the gemological institution and the laboratory standards. Furthermore they should make sure there is no contact between the buyer and the gemologists examining the stone. Certain laboratories will only issue full grading reports for natural, untreated diamonds. If a diamond is treated or synthetic, the grading laboratory should faithfully report this.