What is the color scale based on: The International Color Scale, created by the Gemological Institute of America (GIA), is a standardized language for discussing diamond color. The GIA, the world's leading name in gemology, created the standardized scale for color and clarity that we use today. They use a judging system to evaluate each gemstone, where each stone is evaluated by at least 5 gemologists who must give a unanimous grade in order to receive GIA certification. The full color scale ranges from D to Z, with D grade diamonds appearing icy white and Z diamonds having a pale yellow hue.
| D | Absolutely colorless or frosted white. The highest color class - extremely rare and most expensive. |
| TO | Colorless. A rare, high-quality diamond with only minor traces of color detectable by an expert gemologist. |
| F | Colorless. A slight color was detected by an expert gemologist, but it was still considered a "colorless" grade - a high-quality diamond. |
| G | Nearly colorless. Color is noticeable when compared to better grade diamonds, but offers excellent value. |
| H | Nearly colorless. Color is noticeable when compared to better grade diamonds, but offers excellent value. |
| J | Almost colourless. Slightly perceptible colour - good value. |
