Certificate

The certificate is a must for every polished diamond and practically their worldwide passport. It must be internationally recognized and document the quality and identity of each diamond.

The Gemological Institute of America (GIA) is considered the highest authority in the world when it comes to the evaluation and grading of diamonds.

At DIAGO, each rough diamond is strictly checked for authenticity and conflict-free provenance. Once grinded and polished, all diamonds are sent to GIA for a comprehensive evaluation and certification.

The quality of the certificate is decisive for the price as well as for the later resale.

In addition to the 4Cs, other attributes such as polish, proportions, fluorescence and possible comments in the Diamond Grading Report are relevant to the price.

The report number appears microscopically engraved on the girdle of the diamond; giving buyers a unique way of linking their GIA report to the diamond itself.