• Cut is a measure of brilliance and how well a diamond transmits light.
  • The Cut of a diamond is considered the most important component of a diamond’s beauty.
  • When a diamond is cut properly, light is returned out of the top of the diamond, giving it its brilliance.
  • If a diamond is too shallow, light escapes out of the bottom. If the cut of the diamond is too deep, light is returned out of the sides.
  • Excellent to Very Good cuts on the GIA Cut Grading Scale reflect nearly all of the light that enters a diamond. These diamonds have the most brilliance.
  • A diamond that has a Good cut reflects most of the light that enters a diamond.
  • Fair to Poor cut diamonds lose most of the light out of the side or bottom from being too shallow or too deep.
  • Learn more about the 4Cs of diamonds: Clarity, Color, and Carat.

 

Diamond Cut Grading Scale

Shallow Cut Excellent to Very Good Deep Cut