Cut refers to the angles and proportions a skilled craftsman creates in transforming a rough diamond into a polished diamond. Of the 4 “C”s it is the cut that has the most influence on the diamond’s brilliance and beauty. Round is the most brilliant shape and has the most stringent cut standards.

The World’s Most Beautiful Diamonds Are Cut to Exact Proportions
A well cut diamond will internally reflect light from one mirror-like facet to another and release it through the top of the diamond in a blaze of fire and brilliance. Diamonds that are cut too deep or too shallow lose light through the side or bottom, resulting in less brilliance and ultimately, less value.


Why Is Cut So Important?
Notice how an actual beam of light is fully reflected back to the eye when the diamond is properly cut. When a diamond is cut too deep or too shallow light is lost through the side or bottom resulting in a less brilliant diamond.


Many people confuse diamond cut with the actual shape of a diamond. Cut refers to the proportion and angles which the diamond has been cut. Although the cut of the diamond may affect the value of the diamond, the shape, is largely a matter of personal preference. It is the work of a master cutter that allows the diamond to be cut in such a way as to permit the maximum amount of light to be reflected through the diamond.


Shown are the most popular shapes for diamonds. While round is still the most popular and most brilliant diamond shape, it is still a matter of personal preference.