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Color refers to the tint of the diamond. In nature, most diamonds have a slight tint of yellow or brown color. The closer to being “colorless” a diamond is, the rarer it is. The industry standard for grading color is to evaluate each stone against a “master set” and assign a letter grade from “D” (colorless) to “Z” (light yellow).

Tiffany only accepts diamonds in the “colorless” and “near colorless” range on a diamond color scale.

Borderline diamond color classifications are automatically given the more conservative grade. Additionally, the Tiffany Gemological Laboratory will not accept stones exhibiting strong or excessive fluorescence, which, in natural lighting, can give diamonds a milky appearance.

Diamond Color Chart

Tiffany acceptable color scale.

Tiffany Quality

Other color ranges.

Find your perfect ring

The gemological standards in this guide refer only to round brilliant diamonds from .18 to 2.99 carats set in certain ring styles. Round brilliant diamonds smaller or larger, fancy-shaped diamonds and fancy color diamonds each have their own specially tailored standards of evaluation. Consult your Tiffany Sales Professional for details.

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Square diamond ring.