The AGS Diamond Quality Report gives a full analysis of the diamond with measurements and custom plot. Learn more at AmericanGemSociety.org. Jewelry Association | Top Jewelers, Diamond Education
Diamond Quality Report
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Diamond Quality Report
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The AGS Diamond Quality® Report offers a complete grading analysis of a diamond, including the profile with measurements, and a custom plot. The Diamond Quality® Report provides an option for diamonds that have less-than-Ideal grades on cut, polish or symmetry, and, therefore, shows a maximum grade of AGS 1 (Excellent).


Though the AGS Performance-based Cut Grade covers a variety of shapes, the Diamond Quality® Report is perfect for those that are not yet covered under the system, or for proprietary cut diamonds.

Not all diamonds are Ideal, and when they are not — The AGS Diamond Quality® Report is the ideal choice.

Have questions or comments? Contact AGS Laboratories.

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Mission Statement

The American Gem Society (AGS) is a nonprofit trade association of fine jewelry professionals dedicated to setting, maintaining and promoting the highest standards of ethical conduct and professional behavior through education, accreditation, recertification of its membership, gemological standards, and gemological research.

The Society is committed to providing educational products to inform and protect the consumer and to contributing to the betterment of the trade by creating industry standards to protect the jewelry-buying public and the fine jewelry industry as a whole.

AGS Laboratories, founded to support the AGS mission, is a nonprofit diamond grading laboratory with a mission of consumer protection. Adhering to the AGS Diamond Grading Standards, AGS Laboratories is dedicated to offering diamond grading reports that provide consistency and accuracy based on science.

American Gem Society

8881 W. Sahara Ave. Las Vegas, NV 89117

info@ags.org (866) 805-6500