The diamond’s finish consists of 2 important attributes: Polish & Symmetry. A diamond’s Polish is determined by the manufacturing process of a diamond. Typically, after the diamond is cut and faceted, it is polished to bring out the shine and smooth finish of the diamond. Polish can affect the diamond’s sparkle if not done well. It is a secondary characteristic of the diamond’s cut grade that will sometimes, not always impact the assigned cut grade. Below, you’ll find the Polish scale and examples of blemishes that contribute to the Polish grade.