About AGS Laboratories AGS Laboratories is among the best known and well respected diamond grading laboratories in the world. We have pioneered the development of the first scientific system that evaluates how well a diamond has been cut. Diamond Cut is the most important “C” of all of the four “C’s.” A diamond cut well reflects and refracts light to the maximum degree. Throughout the world, AGS Laboratories has been acclaimed as an innovator because of the extensive research and development that was and continues to be devoted to diamond cut.

AGS Laboratories is respected by consumers, jewelry retailers, and diamond manufacturers alike for accuracy and consistency in every aspect of diamond grading, not only in diamond cut grading, but also color, clarity, and carat weight.

One of the distinguishing factors that separates AGS Laboratories from other diamond grading laboratories is that the mission of AGS Laboratories is one of consumer protection. As a part of the American Gem Society, a group of over 1,200 retail jewelers in North America founded by Robert Shipley in 1927, AGS Laboratories shares the important mission of the Society of consumer protection, adherence to the highest ethical standards in conducting business in the jewelry industry, and continuing gemological education.