The diamond cut does not refer to diamond’s shape but the symmetry, proportioning and polish of a diamond. Cut is the reference to a diamond’s reflective qualities. The cut of a diamond greatly impacts diamond brilliance; this means if it is cut poorly, it will be less luminous. Most diamonds are cut for weight retention, which often results in a deviation from “good proportions“.

There are standards of cutting to produce the optimum of brilliance. Cut is a diamond’s most important characteristic. It has the greatest overall influence on a diamond’s beauty. It determines what we generally think of as sparkle. A poorly cut diamond will have a dull appearance even if it has perfect color and clarity.  The cut is considered one of the most important diamond characteristics by gemologists.