Diamond Certification


A diamond certificate or grading report verifies that a diamond is genuine and evaluates the quality and size of the stone. A diamond certificate is a document issued by a Gemmological Laboratory, detailing the ‘grade’ which indicates the physical properties of the diamond.

The ‘physical properties’ being the cut, clarity, colour and carat of the stone. A certificate is a document, which retains its value over a long period of time, assuming the diamond is not chipped or otherwise altered.

Do not confuse certification with an appraisal, which is an indication of the financial value of the piece under consideration. The financial value of a diamond can easily change over time and appraisals are most commonly used for insurance purposes.

Buying a certificated diamond that is fulfilled by Amazon enables you to buy your diamond with confidence. Every certified diamond comes complete with a certificate issued by an internationally-recognised grading laboratory.

Browse our diamond guide for information on how to select the perfect diamond and shop our selection of certificated diamonds.


GLG CertificationAssay Certification