The American Gem Society Laboratories is the only diamond grading laboratory backed by the jewelry industry's premier consumer protection agency, the American Gem Society, and the first prominent diamond grading laboratory to offer diamond grading reports with a Diamond Cut Grade for not only round brilliant cut diamonds, but princess cut and emerald cut diamonds as well.

AGS Laboratories is the preeminent authority in diamond grading, including diamond cut, providing grading reports for diamonds of all sizes using our succinct 0 to 10 grading scale. AGS Laboratories possesses the only objective and scientifically vetted method of evaluating a diamond's cut. The Diamond Cut Grade impacts the diamond's value and beauty.

Known industry-wide as the laboratory with the highest standards of evaluating diamond quality, the American Gem Society Laboratories employs leading-edge research and technology on diamond grading, diamond cut grade research and the light performance of a diamond, all to benefit you in your diamond purchase. Secure peace-of-mind by asking your jeweler for an American Gem Society Laboratories diamond grading report.


For more information on AGS Laboratories’ diamond grading reports, please click on the images below.