The triangle cut was developed in the late seventies. This cut is an adaptation of the radiant cut but it is in a triangular shape. The triangle diamond shape is like a triangle which is obvious by its name. It has equilateral sides and is a combination cut of the step cut and the brilliant cut diamond.

When cut properly, triangle diamond shows a wonderful brilliance. They are often cut shallow and often look large for their carat weight. Triangle diamonds are beautiful when flanking a center diamond, or in a more advante-guarde piece as a center diamond. a matched pair also create beautiful earrings. By virtue of these qualities triangle diamond is in great demand.