Colour refers to the natural tint inherent in white diamonds. In nature, most white diamonds have a slight tint of yellow. The closer to being “colourless” a diamond is, the rarer it is. The industry standard for grading colour is to evaluate each stone against a master set and assign a letter grade from “D” (colourless) to “Z” (light yellow).
Diamond Colour Chart
Tiffany only accepts engagement diamonds in the “colourless” and “near colourless” range on a diamond colour scale. In other words, for engagement rings, Tiffany only accepts D colour diamonds, E colour diamonds, F colour diamonds, G colour diamonds, H colour diamonds and I colour diamonds. Borderline diamond colour classifications are automatically given the more conservative grade.
Very Light Yellow
The gemmological standards in this section refer only to individually registered engagement diamonds set in certain ring styles.
Does Diamond Colour Matter?
Colour is the second most important of the 4Cs because the colour grade directly affects the stone’s appearance. Diamonds with a poor colour grade can appear slightly yellow instead of the desired brilliant white. Additionally, the Tiffany Gemmological Laboratory will not accept stones exhibiting strong or excessive fluorescence, which, in natural lighting, can give diamonds a milky appearance.
“If you’re buying a piece of jewellery from Tiffany, you’re buying a piece of artwork.”
—Paul Domiciano, model maker
Frequently Asked Questions
White diamonds are given a colour grade of D (colourless) to Z (light yellow). Tiffany only accepts engagement diamonds in the “colourless” and “near colourless” range on a diamond colour scale. For engagement diamonds, Tiffany only accepts D, E, F, G, H and I colour diamonds. Fancy colour diamonds such as yellow or pink diamonds have their own colour grades.
Among white diamonds, D colour diamonds are of the highest grade. D colour diamonds are in the "colourless" range on a diamond colour scale along with E colour diamonds and F colour diamonds. Fancy colour diamonds such as yellow or pink diamonds have their own colour grades.