Diamond Color

The Color of a diamond varies from colorless to light yellow. Diamonds with less color are more valuable because they allow natural white light to reflect all the colors of the rainbow as it passes through the stone. The color quality of a diamond is graded from D (colorless) to Z (yellow). Diamonds with a grade closest to D are the most valuable.

Since light source and background can have a significant impact on the appearance of color, the diamond's color is graded in a standardized viewing environment. Color graders submit their independent opinions into the system. During this phase, graders are not privy to color opinions entered previously. The color grade is determined when there are sufficient agreeing opinions.