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Diamond Certification

Diamond Certification or Diamond Grading Report

A diamond grading report is essentially a statement attesting to the authenticity of a diamond. It provides a true and accurate statement of the diamonds characteristics and grade based on internationally recognized standards.

A diamond grading report will includes a plotted diagram of the diamond and all significant characteristics, cut, colour, clarity and carat weight. The report also describes the diamond's shape, exact measurements and proportions as well as grade the polish and symmetry. The report comments on the distinctiveness of the diamond, like fluorescence if present, graining, and any imperfections the diamond may have.

A diamond grading report is not a retail monetary valuation of the diamond; it is simply a scientific document that clarifies all aspects of the diamonds individuality.

Retail monetary valuations should be conducted locally as retail values may differ depending on local taxes and margins. At Jason Withers, we provide a third-party retail evaluation on request.

Grading Reports at Jason Withers Original Diamonds

Jason Withers supplies all diamonds over 50pt with independently graded and certificated diamond certificate by either of the internationally recognized Diamond Grading Organizations. Jason prefers the use of GIA graded diamonds, as this is a not-for-profit organisation with the most stringent, accurate, and internationally recognised grading standards.


Samples of diamond grading certificates.

Diamond High Council (Hoge Raad Voor Diamant; HRD)

Diamond High Council (Hoge Raad Voor Diamant; HRD)

American Gemological Society (AGS)

American Gemological Society (AGS)

International Gemological Institute (IGI)

International Gemological Institute (IGI)

International Gemological Institute (IGI) - Hearts & Arrows

International Gemological Institute (IGI) - Hearts & Arrows

International Gemological Institute (IGI) - Laser Inscribed

International Gemological Institute (IGI) - Laser Inscribed

European Gemological Laboratory (EGL)

European Gemological Laboratory (EGL)