The beauty of a diamond is primarily determined by the way it handles light. Sparkle, brilliance, and fire are all effects that derive from the cut quality of the diamond - the proportions, facet alignment, and finish. There are a number of diagnostic tools used to evaluate the key aspects of light performance such as light return, light leakage, dispersion (
'fire'), scintillation, and optical precision. Please see our
diamond analytics page for detailed information on light performance diagnostics available to the consumer today.