Most diamonds found in jewelry stores run from colorless to near-colorless, with slight hints of yellow or brown. The diamond color scale begins at D (colorless) and ends at Z (light yellow). Diamond color is often difficult to discern when a diamond is viewed face up.
GIA’s color-grading scale for diamonds is the industry standard. The scale begins with the letter D, representing colorless, and continues with increasing presence of color to the letter Z, or light yellow or brown. Each letter grade has a clearly defined range of color appearance. Diamonds are color-graded by comparing them to stones of known color under controlled lighting and precise viewing conditions.
Many of these color distinctions are so subtle as to be invisible to the untrained eye. But these slight differences make a very big difference in diamond quality and price
Diamond color is one of four major characteristics that are considered when determining a diamond’s quality and value. Understanding these four characteristics, and how they interact, will help you choose a diamond that suits your tastes and your pocketbook.
Diamonds are not all colorless, but it’s the colorless diamonds, sometimes called white diamonds, which all other shades are judged against.
The diamond color scale begins at D (colorless) and ends at Z (light yellow). Diamond color is often difficult to discern when a diamond is viewed face up. Therefore, gemologists typically evaluate diamonds facedown against a pure white surface, illuminated by carefully controlled lighting. The diamond is then compared to master stones of predetermined color.