Round-cut diamonds will receive a cut grade from the GIA. The GIA does not assign a cut grade to fancy-shaped diamonds. They will, however, assign a polish and symmetry grade to fancy shapes, which contributes to the stone’s cut quality. Always choose excellent polish and excellent symmetry for your fancy-shaped diamond.
While many fancy shapes are very sparkly, they are not as sparkly as the round-cut diamond. The shape of the round-cut diamond, as well as the placement of its facets, are designed to create optimal light return, which creates lots of sparkle and brilliance.