The diamond color scale: D to Z explained

The GIA color scale goes from D to Z - and many people ask why it doesn’t start with A. Before this scale was implemented, various grading systems were used, many of which used A, B, and C grades. So, to avoid confusion, the GIA chose to start their scale at D.

Here’s a breakdown of color gradings, as per the GIA diamond colors chart (which is internationally recognized):

• D-F (Colorless): These are the rarest, most expensive diamonds. They have an icy-white look and show no visible color to the naked eye. They’re at their brightest in platinum or white gold. 
• G-J (Near colorless): These diamonds still appear white, which makes them excellent value. In fact, many buyers opt for a G-H diamond to strike the right balance between price and appearance.
• K-M (Faint color): Even more budget-friendly, K-M stones have a soft, noticeable warmth, which can blend beautifully with a yellow or rose gold setting.
• N-R (Very light color): These are less commonly used as center stones, as the yellow color is more noticeable.
• S-Z (Light color): S-Z diamonds can look fairly tinted, so they’re rarely used in modern-day jewelry designs. Nevertheless, they can be a distinctive choice for those who love vintage-inspired or unique designs.

Image from the Gemological Institute of America Inc. GIA

For a center stone, the debate usually comes down to colorless vs. near colorless. If you’re working to a budget or prefer yellow or rose gold, near colorless is a smart choice. If you’re after that crisp, icy look in white gold or platinum, a colorless stone could be the right choice for you. 

Does diamond color matter?

So, is diamond color important? In terms of diamond grading, yes, the color of a diamond is very important. But when it comes to your buying decision, it’s all about personal preferences, the type of setting you love, and your budget. It’s about striking the right balance across all 4Cs, so it’s worth knowing what matters most to you.

When choosing a white gold or platinum setting, it’s more important to make diamond color a priority. But diamond color doesn’t matter as much when it’s in a warmer setting, as a near-colorless stone can look icy white on a yellow or rose gold band, and a faint colored stone can blend seamlessly with it. 

But does color affect brilliance? Less than you might think. Color affects how white a diamond looks, but cut does most of the work when it comes to how it handles light. Brilliant cuts like round and oval tend to mask a hint of color, while step cuts like emerald and Asscher have open, glassy facets that show it more. So if you opt for a lower color grade, a brilliant cut gives you a little more room.

How to choose the right diamond color for you

Selecting the best diamond color for your ring really depends on a few key factors:

Metal Type:

• White gold or platinum: Cool-toned metals can make a yellow tint more apparent due to the contrast, so we’d recommend pairing white gold and platinum with diamonds in the D-H range.
• Yellow or rose gold: Conversely, warmer metals like yellow and rose gold can mask slight tints in the diamond, making K-M diamonds a savvy choice.

Setting Style:

• Solitaire settings: This type of setting showcases diamonds more prominently, so a higher color grade would be better.
• Halo or pavé settings: diamonds in the G, H, or I range (with a center stone of H or higher) can be a good choice here, as they let you add more diamonds without adding too much to the price.

Personal Preference:
Some people are drawn to the icy, colorless look of a D-F diamond, while others love the romantic warmth that a slightly tinted stone brings. There’s no right or wrong here. It’s all about what feels right for you. 

Still undecided or unsure how to choose your diamond color? If you're looking for a sweet spot, G-H diamonds hit it. To most eyes, in most settings, they still look colorless. 

What about fancy colored diamonds?

So what color diamonds are there? Just about every color of the rainbow. But fancy diamonds are rare, as only one in 10,000 diamonds is naturally fancy colored. The rarest diamond color is red, with only about 20-30 natural red diamonds known to exist in the world. That’s why this type of diamond tends to command a high price. 

Many rare colors of diamonds offer an emotional, expressive quality that collectors are drawn to. So it only makes sense that, instead of being graded on the absence of color, fancy colored diamonds are evaluated based on the strength, tone, and saturation of their hue. Whether it’s a pink, blue, yellow or green diamond, the deeper and more vibrant the color is, the more prized the diamond.

Diamond color FAQs

What’s the best diamond color for a white gold ring?

D-H color diamonds pair beautifully with white gold, as the cool metal tone brings out their brightness.

Is a D color diamond worth it?

It’s the rarest and most valuable color grade. That said, a D grade isn’t always necessary. If having the very top of the scale matters to you, go for it. If not, a near colorless stone will look just as bright once it’s set.

What’s the most popular diamond color?

Near colorless diamonds (G-J) are the most popular, as they offer a high-end look without the D-F price tag.

Can you tell the difference between G and H color?

To the untrained eye, they’re virtually identical, especially once they’re in their setting. 

Is K color too yellow?

Not necessarily. K color diamonds can blend beautifully in yellow or rose gold settings.

Final thoughts on choosing diamond color

Diamond color is one piece of the puzzle. An important one, though. It affects the overall aesthetic and price of your ring, and it should always be considered alongside cut, clarity, and carat.

It’s always a good idea to see different colored diamonds in person, so you can see for yourself how they look in different lighting and settings. Still need help deciding? Our team of diamond experts is here to help you find the right stone.