These are of triangular shapes. The edges of the stones are rounded or cropped along with their 3 sides. These shapes of stones are generally used for solitaire stones. This shape of the stone is a type of brilliant round-cut and its shape form with 31 to 43 sparky sides. Trillian cut shape is also known to maximize the color and brilliance of the gemstone. Due to their shallow cut, these shapes create an illusion of seeming bigger than their weight. Because of their unique shape, they make an excellent value whether set as a solitaire stone or side stones.