It is often thought that a brilliant is a type of diamond that is rarer or more expensive. However, that is not correct. Brilliant is the cut of the diamond. In addition, other gemstones can also be cut into a brilliant cut. The difference between a diamond and a brilliant lies in the cut. The brilliant refers to the most common cut of the diamond which you can easily recognise it by its round shape. A brilliant has 58 facets placed in a specific way to reflect the invading light. This gives the diamond a unique sparkle and shine.