Basic Triangle Shaped Diamond Ring The basic design of a triangle shaped diamond ring includes a triangular diamond or a trillion cut diamond as the main gemstone. It is secured using a bezel setting in order to offer a stylish appeal and also a thin diamond ring band is used to highlight the center diamond.     Sparkling Triangle Shaped Diamond Ring Design In this design, a brilliant trillion cut diamond is used as the main gemstone and is held in place using V prong settings to save it from chippings and other external shocks. To elevate the overall look and the sparkle of the engagement diamond rings, the thin shank of the ring is also entirely paved with melee diamonds. Contemporary Triangle Diamond Ring Design This type of engagement diamond rings usually features an open-end design. Oneof these open tips showcases a bezel-set trillion cut diamond and the other end displays a V-shaped structure that is embedded with diamonds. The whole band is also paved with accent diamonds to offer a sparkling appeal.