Cut

Cut refers to the angles and proportions a skilled cutter creates while fashioning a rough diamond into a polished diamond. Based on scientific facts, a well-cut diamond will reflect light from one mirror-like facet to another and reflect it through the top of the stone. This is what creates the brilliance and fire of a diamond.

Diamonds that are cut too shallow or too deeply lose light through the sides and bottom making that stone less brilliant and have less value.