What if a diamond has less than 17 facets?

The number of facets on a diamond is dictated by its size and the shape of the cut. For example, an emerald cut stone has 57 facets and a baguette cut stone has 25.

The radiant cut has 70 facets.

An 8/8 or single cut stone has 17 facets. When the symmetry of the facets is angularly perfect, the table of the stone delivers optimum luster for the stone.