---
title: "Colorless (D–F): meaning in gemology"
description: "Colorless is the top range of the D-to-Z scale: the grades D, E and F."
url: https://digitalgemology.com/learn/glossary/colorless
image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01
---

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[Glossary](https://digitalgemology.com/learn/glossary) · Color and fluorescence

# Colorless (D–F)

Also called D-F, D color, E color, F color, colorless range

Colorless is the top range of the D-to-Z scale: the grades D, E and F.

## In more detail

These are the rarest grades. Even a trained grader can tell them apart only beside master stones.

## On a grading report

Shown by the color letter; IGI names its bands on the report.

## Related terms

- [Color grade](https://digitalgemology.com/learn/glossary/color-grade): The color grade is a letter from D to Z for the yellow or brown tint of a near-colorless diamond. D is colorless and Z is light yellow or brown.
- [Near colorless (G–J)](https://digitalgemology.com/learn/glossary/near-colorless): Near colorless is the D-to-Z range from G to J.
- [Master stones](https://digitalgemology.com/learn/glossary/master-stones): Master stones are reference diamonds of known color grade. A grader sets a diamond beside them to decide its D-to-Z letter.

## Learn more

- [The diamond color scale, D to Z: where you first see a tint](https://digitalgemology.com/learn/four-cs/diamond-color-scale-d-to-z)

[All 328 terms](https://digitalgemology.com/learn/glossary)