What is the difference between a diamond and a brilliant?
A diamond is a stone; a brilliant is the name of a cut. A brilliant is cut in 57 facets.
Brilliant is often confused with diamond, but the two are not synonyms. Brilliant is only the cut of the diamond in 57 facets. It is actually short for brilliant-cut and stands for the way of cutting that contributes to the view and reflection of light of the diamond.