Diamond Cut Grade
Cut is the only factor that fuels a diamond’s fire, sparkle, and brilliance. It is widely considered the most important of the 4Cs.
The Anatomy of Sparkle
When a diamond is cut to ideal proportions, it bends and reflects light in three specific ways.
Brilliance
The white light reflected from the surface and inside the diamond. This creates the primary brightness of the stone.
Fire
The scattering of white light into all the colors of the rainbow. This dispersion gives the diamond its magical, colorful flashes.
Scintillation
The amount of sparkle a diamond produces, and the pattern of light and dark areas caused by reflections within the diamond.
The Cut Grading Scale
Represents the top 3% of diamonds. Reflects nearly all light that enters the diamond. The rarest and most brilliant cut.
Reflects almost as much light as an Ideal cut but at a lower price point. An outstanding choice for engagement rings.
Reflects most light that enters. Appears very similar to Excellent cuts to the naked eye but often has slightly wider proportions.
Reflects much of the light. A great option for budget-conscious buyers who want to maximize carat weight.
Allows most light to escape from the sides or bottom. The diamond appears dull and lifeless. We do not carry these grades.
It's All About Proportions
For a Round Brilliant diamond, two key ratios determine its cut grade: Depth % and Table %.
Ideal Depth (59% - 62.6%)
The height of the diamond measured from the culet to the table. If too deep or too shallow, light escapes through the sides.
Ideal Table (53% - 58%)
The width of the top flat facet relative to the diamond's total width. This acts as the window for light to enter.
Our Recommendation
For the best balance of beauty and value, we recommend selecting an Excellent or Ideal cut grade. This ensures your diamond will sparkle brilliantly, even in low light.
Shop Ideal Cut Diamonds