The evaluation of the color of diamonds is, in fact, based on "the absence of color".
The purer a diamond, the higher it has a value; the more colorful it is, the more significant the impact on its value.
The diamond industry uses a color scale to classify diamonds, ranging from color D to color Z, ie from "exceptional white " to "light yellow".
D: Exceptional white
E: Exceptional white
F: Extra white
G: Extra white
H: White
I to L: Shaded white
M to Z: Tinted
There is no color A, B or C. 
