For round diamonds with exceptional light performance, IGI includes calculations for key, quantifiable components associated with diamond beauty: Total Light Performance, Brightness, Fire, and Contrast.
- Total Light Performance: Cumulative intensity of the diamond’s brightness, fire, contrast and scintillation.
- Brightness: All reflected and refracted white light
- Fire*: Dispersed light seen as flashes of color
- Contrast: Balance and intensity of bright and dark areas
