Intensity of the light reflecting out of the stone through the crown (aka 'Dispersion', 'Fire').

A stone with maximum dispersion and fire, a lot of life.

Total amount of white light returned to the eye from a diamond or colored stone as the result of internal and external reflections. The major factors that affect the amount of brilliancy in a gem are refractive index, proportions, polish and transparency.

refers to the amount of light reflected through the surface of a diamond and is maximized by cutting a diamond to the correct proportions.