A diamond certificate, also called a diamond grading report, diamond dossier®, or diamond quality document. It is a report created by a team of gemologists. The diamond is evaluated, measured, and scrutinized using trained eyes, a jeweler’s loupe, a microscope, and other industry tools.
A completed certificate includes an analysis of the diamond’s dimensions, clarity, color, polish, symmetry, and other characteristics. Many round diamonds will also include a cut grade on the report.
The most known certificates are from the Gemological Institute of America and the European Gemological Laboratory.