The overall smoothness and condition of the diamond’s surface. A well polished diamond produces crisp reflections and maximized light transmission.

The exactness of shape and alignment of individual facets. A diamond with excellent symmetry will have beautiful brilliance.

A diamond's fluorescence grade refers to the intensity of the diamond’s reaction to UV light (like black light). The GIA conducted a study which concluded that none to medium fluorescence has no negative impact on a diamond's appearance, which is why we only work with none-medium fluorescence grades. This study also found that some fluorescence can make IJK color diamonds appear whiter.