When it comes to diamonds the best color is no color. Well cut stones allow light to be reflected and dispersed in a way that when delivered back to our eye produces a beautiful scintillating rainbow.
However, light dispersion has no effect on the technical grading of color.

The absolute finest colorless diamond carries a D color rating.
These ratings descend through the alphabet to Z, designating a diamond of light yellow or brown.

Color gradations are so minute and precise that discerning a single grade (even by an expert) under less than ideal laboratory conditions is virtually impossible.


Why does the GIA color grading system start at D?



In some exceedingly uncommon instances diamonds are found in varying exotic colors like pink, blue, green, amber, and even red. These stones are prized for their extreme rarity and are referred to as “fancies,” their intensity is graded and governed by a different scale than white diamonds.