The AGS Ideal®

An unparalleled grade—backed by unmatched science.

  • The premier cut grade backed by the American Gem Society’s highest standards
  • Peer-reviewed science published in major journals
  • A designation reserved only for superior diamonds 

AGS earned 10 patents during the course of its groundbreaking optical engineering research into discerning the cut quality of an AGS Ideal® diamond. 

Our patented methodology uses ray-tracing to analyze the light performance of a diamond in order to measure the attributes most important to a diamond’s beauty. The result? An uncompromising view of how light is reflected and refracted throughout the diamond. 

half aset and half diamond image