Grading Cut

GIA provides a cut quality grade only for standard round brilliant diamonds that fall in the GIA D-to-Z color range.

After the color and clarity grading process, the diamond’s proportions (measurements and facet angles), along with its polish and symmetry descriptions, are used to determine its GIA Cut Grade. A diamond’s brightness, fire, scintillation (sparkle and pattern), weight ratio, and durability, as well as polish and symmetry, are all considered within this final assessment of cut quality.