Facets that are placed on a diamond in addition to those needed to fulfill the requirements of the Brilliant Cut or step cut (as in Emerald Cut) style.

They are commonly used to polish out a minor Blemish such as a Natural or a nick. Extra facets are not considered in determining a Clarity Grade. In fact, diamonds with very high clarity grades often have many extra facets that were required to polish away the inclusions and blemishes to attain the higher grade.

Extra facets have no impact on the durability of the diamond, but they may have a slight effect on the brilliance, because they can disturb the Light Performance that is calculated from the mathematics of designs like the Tolkowsky Cut.