SINCE THERE ARE NO LAWS THAT REGULATE ON HOW THEY GRADE THEIR DIAMONDS, DIFFERENCES MAY APPEAR AMONG DIFFERENT GRADING COMPANIES. WE ONLY DEAL WITH CERTIFIED DIAMONDS FROM THE MOST RESPECTED LABS: GIA, EGL AND AGS.GIA - Gemological Institute of America:
The GIA Lab is the most common and sets the industry standard for COLOR and CLARITY grading.EGL - European Gemological Laboratory:
The EGL certification is typically less demanding than the GIA certification. Their grading system may be more lenient.AGS - American Gem Society:
The AGS certification uses a diamond grading system that ranks cut, color, and clarity on a zero to 10 scale with zero being the most rare and desirable and 10 being the least desirable.