Why AGS Laboratories?
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AGS Laboratories

Because your diamond deserves the best.

When shopping for something as precious and rare as a natural diamond, it’s important that the diamond includes a diamond grading report from an independent laboratory. A thorough grading report covers all 4Cs—cut, color, clarity, and carat—so that you know and understand the quality of what you are purchasing.  

Most diamond grading laboratories were created as a service to the diamond industry. Not AGS Laboratories. We were founded in 1996 by the American Gem Society (AGS), and are a nonprofit diamond grading laboratory with a mission of consumer protection. This mission ensures you will receive an unbiased opinion on the quality of your diamond. 

This is why it’s essential to have a diamond grading report from AGS Laboratories. It reveals the genuine quality of your precious gemstone, both inside and out. 

AGS Laboratories Diamond Grading Reports feature:

  • Clear and precise grading that is easy to understand
  • First of its kind, patented technology based on science, with grading reports that offer consistency and accuracy
  • Our reports provide six security measures to ensure authenticity

Ask your jeweler for an AGS Laboratories Diamond Grading Report. Accept no substitutes, and buy your diamond with confidence!

Only My Diamond
Makes Understanding the
4Cs Simple

Cut to the Chase


Natural or Not?


Security You Can
Count On

Verify Your AGS Laboratories
Diamond Grading Report

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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