Glittering Stones » Diamond 4 C's » Color

Color

Diamonds are valued on their colorlessness. The less color, the higher the value. Diamond color ranges from colorless to yellow. The GIA’s Color Grading Scale for diamond is the industry standard. The scale begins with the letter D representing colorless and continues by increasing the color to letter Z. In GIA’s color grading scale, each letter grade has a defined range of color appearance. The color distinction makes a very big difference in diamond quality and price.

Before GIA’s D-Z color grading scale system, variety of color grading system were applied and it includes letters of alphabet (A, B and C), Arabic (0, 1, 2, 3) and Romans (I, II, III).