Diamond Color

diamond on purple flower

How Sensitive Are Your Eyes?

In nature, diamonds are found in almost every color and hue you can possibly imagine; grey, white, yellow, red, green and brown. And contrary to popular belief, it is actually very rare to find a diamond that doesn’t have any color at all. 

So, what makes a diamond’s color so important when making a purchase? It comes down to the behavior and physics of light when it passes through different mediums.

Colored diamonds (e.g. black, brown, gray) can negatively affect light absorption, and thus the sparkle of the stone that we see. That is why white (colorless) diamonds are generally more valuable and commonly used in jewelry as they have better reflective qualities. Of course, the exceptions to this rule are the rare and much sought after colors of pink, red, blue and orange.

Diamond Color Grading Chart

diamond color chart

When it comes to grading color, GIA had devised a system of describing diamonds in the normal range with letters from D (colorless) to Z (light brown or yellow). If the depth of color in a stone is stronger than a Z, then the fancy color grading system is utilized instead.

In the grading process, the loose stone is flipped over by a trained observer and comparisons are made against a known set of masterstones. When the stone is viewed and compared with its table facing down, the color differences will be most obvious.

Looking at the diamond in this manner also helps prevent distractions from the internal and surface reflecting facets. Finally, for accurate grading to take place, it is always done in a controlled environment with special lighting to ensure consistency.

Click here to view videos of actual diamonds with various shapes and sizes in the D-K color range.

Line Up Of Diamonds For Comparison Between D – Z

a lineup of diamonds with different color grades

Notice that the color near the tip of the cone is more saturated and shows up easily.

When the diamond is flipped around and mounted on a setting, it would be extremely difficult for untrained eyes to pick up subtle differences in color. I will discuss this in detail on later pages and show you how to buy diamonds that face up white without blowing a hole in the bank.

Why Doesn’t The Grading Start From A Instead of D?

Here’s a trivia question that I get asked a lot. Why does the GIA system start at the alphabet D and not A, B or any other letter for that matter?

You see, before GIA’s grading system was widely accepted by the trade, different jewelers would use “A”, “AA” or other weird nomenclatures to label their diamonds. As you could imagine, consistency was a nightmare and the terms used to depict a diamond were causing huge confusion at that point in time.

Based on what I heard from my GIA instructors, GIA decided to start their grading system with the letter D so that they won’t get associated with other systems already in the market.

A Quick Overview of Color Grading Behind the Scenes



So, how should you choose a color for your diamond? Just how important is this factor when making an engagement ring purchase? Are there any preferred colors for specific jewelry applications? I know you probably have more questions in your mind now. Keep on reading to find out more…

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  1. Collette-
    February 6, 2015 at 2:56 pm

    I recently inherited some diamonds from my grandmother and these are uncertified stones which I brought to a local appraiser. The size ranges from 1.20 carats emerald cut, 1.40 carats oval and a 2 carats round diamond. The appraisal come back which indicated the following:

    1.20 carats emerald cut – Good Polish / Good Symmetry, P color – very light brown
    1.40 carats oval cut – Good Polish / Poor Symmetry, W-X color – light yellow
    2.03 carats round cut – Good Polish / Very Good Symmetry U color – light brown

    I’m a little confused about the differences between brown and yellow. Also, is there a good way to sell them without getting scammed?

  2. Paul Gian-
    February 7, 2015 at 7:40 am

    All naturally mined diamonds have tints of color to them. Green, yellow, pink, brown, blue etc… When the color grading is below K color, GIA indicates the hue of the color in their report. Generally speaking, brown hues are less “valuable” than yellow hues because of market forces. The best way to go about selling your diamonds would be to obtain reliable grading reports for each stone first.

    Once you have those documents, look for a jeweler whom you can consign the stones to. That’s the easiest way to handle your current situation.

  3. Linda-
    March 7, 2015 at 2:08 pm

    Is there a reason why a D colored diamonds is so much more expensive for a F colored diamond? I’m considering a 2 carat diamond and the price differences I noticed in stones of similar clarity (VVS1), cut (both are GIA XXX). When I did my research, I found that the prices for smaller diamonds like 0.50 carats didn’t have such a big disparity in costs with a difference of 2 color grades.

  4. Paul Gian-
    March 18, 2015 at 2:55 am

    When it comes to large sized diamonds, every increase in color, clarity grade will exponentially add to the diamond’s value. This is largely due to rarity reasons and that it is very hard to find them in nature. For smaller diamonds like 0.30 carats, you will realize that an IF diamond doesn’t cost a lot more than another diamond with VVS2 clarity. This is due to the relative abundance of them in nature.

    If you want to have a better understanding of prices, this article might interest you: http://beyond4cs.com/diamond-prices/

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