What is Excellent polish?
Polish is the quality of a diamond’s finish or how smoothly the surface of a diamond has been polished. A diamond with Excellent polish has no polish defects visible at 10× magnification. Small surface defects, such as pits and polish lines, are often created by the polishing wheel during the polishing process and can usually be removed through re-polishing. While they are often invisible to the unaided eye, having a lot of surface defects will dim the shine and sparkle of the stone.
What is Excellent Cut?
Cut is a diamond’s most important factor. It determines a diamond’s proportions — its depth and the angles of its facets — which in turn affect how light bounces around in a diamond. An Excellent cut grade means that a diamond has been cut within parameters that allow the diamond to give off intense brightness, sparkle and fire, while having an even pattern of light and dark areas (scintillation). Poorly cut diamonds often have large light or dark patches that make the stone appear dull or uninteresting to the eye.