Working together, Light Performance and the "4Cs" are a powerful, modern approach to diamond evaluation. 
Sarine uses the determinants of BRILLIANCE, FIRE, SPARKLE and SYMMETRY to evaluate a diamonds light performance. 
FIRE is defined as the vivid colours of the rainbow that radiate from within the diamond. 
SPARKLE is defined as the flashes that burst out of the diamond as it moves. Sparkle is calculated via measurements of Contrast, Dynamic Fire and Static Fire.
BRILLIANCE is defined as the intense bright light that shines from the diamond. 

SYMMETRY is defined as the measure of light distribution in the diamond, based on cut and inclusions.