Cut

The cut scale ranges from excellent to poor, and provides a cut quality grade for standard round brilliant diamonds that fall in the D to Z color range. The result is a magnificent display of three attributes. Brightness is the combination of all white light reflection from the surface and interior of a diamond. Fire describes the "flares" of color emitted from a diamond. Dispersion describes the flashes of light you see when the diamond, the light, or the observer moves.

A polished diamond's proportions affect its light performance, which in turn affects its beauty and overall appeal. Diamonds with fine proportions, symmetry, and polish optimize their interaction with light and have increased brightness, fire, and dispersion.