A diamond’s color grade is largely considered to be one of the most important characteristics when assessing a diamond to purchase, usually a priority only secondary to cut. Even subtle differences in color can dramatically impact a diamond’s value. For example, when comparing diamond clarity, weight and if two diamonds have the same clarity, weight and cut, the slightest hint of color in one will decrease its value. Many of the diamonds sold today are near colorless, but in reality, the normal range of color for diamonds can vary from absolutely colorless to light yellow or brown. This is why the Gemological Institute of America (GIA) developed a diamond color scale, which is now widely accepted as the industry standard grading system. Whether looking for a diamond engagement ring or other diamond jewelry, understanding the color grades is key to properly inform any of your diamond purchases.

A depiction of diamonds becoming more yellow the lower in the color scale they're graded.

The Diamond Color Chart

The color of a diamond is really an evaluation of the absence of color. A chemically pure, structurally perfect diamond has absolutely no hue, which results in it having a much higher value since that level of quality is so rare. The GIA’s grading system requires the presence or absence of color in a single stone to be measured in comparison to masterstones of previously established colors.

The GIA scale starts with the letter D, which represents a perfectly colorless diamond, and continues to the letter Z, with each letter in between delineating an increasing presence of color. The average person is able to detect the difference between a grade D diamond and that of a Z because of the significant difference between the opposite ends of the scale. However, generally, measurements must take place under explicitly controlled lighting and precise viewing conditions by a trained professional, as subtle differences may be undetectable to an untrained eye. The scale can be further broken down into five categories with color grades that range from colorless to light in color.

Colorless. Grades D, E and F on the scale make up the Colorless diamonds. Only an experienced gemologist will be able to detect the precise differences between these three gradings, but the corresponding value will differ greatly. Grade D diamonds are extremely rare and absolutely colorless, while E and F grades contain minute traces of color largely unnoticeable to the everyday consumer.

Near Colorless. G, H, I and J are the grades considered Near Colorless. These diamonds have a slightly warm and yellow tone that is difficult for consumers to detect unless compared side-by-side with a diamond of a higher grade. Generally speaking, the faint yellow hues pair well with gold tone settings.

Faint. Grades K, L and M make up the Faint category of colors. At this point, you may begin to be able to detect the tint of the diamond without prior training, since they possess a visible yellow tint. Due to the color variation, diamonds of this grade are much less desired, resulting in steep price drops from the previous category. A grade K diamond can cost as much as 50% less than a grade G diamond. For this reason, many diamond stores and dealers don’t hold diamonds below I-J color in stock, However, some people find the warm coloration appealing, and may be interested in diamonds of these grades when designing a vintage style ring.

Very Light. N, O, P, Q and R are the grades that make up the Very Light category and have a strongly notable color. The color can vary from yellow to a brown tint and are sometimes referred to as “top light brown” within the industry. These diamonds have very low demand, which results in extremely low prices (possibly the lowest within the industry).

Light. All other grades from S to Z are considered Light. Interestingly, Light colored diamonds - specifically those beyond a U grade - usually have greater demand than Very Light diamonds. This is due to the fact that the slightly stronger color is seen simply as a yellow stone, rather than an off-color diamond. However, diamonds of these grades are still not considered to be fancy colored diamonds.



Loose Nexus Diamond alternatives

Impacts on Color

Diamond prices are largely dependent on the diamond’s color grade. However, there are a number of components that can have an impact on the visible appearance of a diamond’s color and play a role in what makes a diamond sparkle. These should be considered especially when assessing diamonds that are only a few grades apart on the color scale.

Setting. Selecting a setting that pairs well with your diamond and is similar in tone can help neutralize any hues in the diamond itself. For example, choosing a yellow gold setting for a Near Colorless diamond will effectively absorb any yellow tones contained within the diamond. Likewise, Colorless diamonds may look the brightest set in white gold or platinum to highlight their pure lack of color.

Shape. Certain shapes of diamonds have the ability to show or hide color to varying degrees. Cuts like round or princess, for example, reflect more light, which in turn, masks more color. Step-cut diamonds such as emerald or Asscher, however, may highlight any hues of color because these cuts have fewer facets. This results in larger windows into the diamond to see Color. Similarly, fancy shape cuts, like pear and marquise, can also have slightly more concentrated color at their pointed ends.

Size. Simply put, color is easier to see in a larger diamond. If you are considering purchasing a lower grade stone, be careful to also do carat size comparisons. If you’re looking above 1 carat, you should look for a grade H diamond or better.

Fluorescence. When exposed to ultraviolet (UV) radiation, many diamonds emit a visible light known as fluorescence. And despite being undetectable by the human eye, UV radiation is all around us, contained in sunlight and emitted by fluorescent lighting. The fluorescence of a diamond can be seen under the right conditions and is most often blue. In rare cases, it can be white, yellow, or orange. If a diamond’s blue fluorescence is strong enough, it can make a light yellow diamond appear close to colorless when exposed to UV rays like sunlight. However, if a diamond’s fluorescence is too strong, it can make the diamond look cloudy, which can then lower its value.



What is the Best Color Diamond to Buy?

Unfortunately, there is no straight answer to this question, as it will mostly depend on what is important to you as the buyer. Colorless diamonds, grades D-F, will always represent the highest quality stones that you can get. However, they are rare and therefore quite expensive. Near Colorless diamonds, grades G-H, represent the best value if you are on a budget. Due to their slightly lower grade and presence of some nearly undetectable color, these diamonds are generally more affordable, with hues only a trained professional will be able to see. If you are looking for something small and would like a yellow gold setting, an even lower color grade diamond may be more suitable for your needs and budget.

If you’re looking for a more affordable diamond and don’t want to compromise on quality or beauty, a lab diamond alternative can be a wonderful option to consider. Many wonder, are lab diamonds real? Lab diamond alternatives such as Nexus Diamonds™ are created in a lab so that every diamond alternative has the qualities imitative of a perfect natural diamond. By selecting one of these diamond alternatives for your engagement ring or diamond jewelry, you can get a D grade simulant stone at a fraction of the cost, due to the methods of producing lab made diamonds.

A solitaire sapphire ring from Diamond Nexus

Fancy Colored Diamonds

One in every 10,000 diamonds possesses natural color and is considered a “fancy colored diamond”. These diamonds are graded on a separate scale than white or colorless diamonds. The more intense and evenly distributed the color is, the more rare and valuable the diamond is. In some cases, colored diamonds can be even more valuable than white ones. The specific color of a fancy colored diamond is the most important characteristic used to evaluate the value, closely followed by diamond clarity, carat and then cut. The unique grading scale for colored diamonds was also developed by the GIA and measures increases in color strength from Faint, Very Light, Light, Fancy Light, Fancy, Fancy Intense, Fancy Vivid, Fancy Dark and Fancy Deep. Fancy Vivid and Fancy Deep are typically considered the most valuable. The existing base colors for fancy colored diamonds include red, blue, pink, green, purple, violet, gray, brown, orange, yellow and black.



The Diamond Nexus Promise

Diamond Nexus developed a patented lab-grown diamond alternative to simulate the look, weight, and feel of a naturally mined diamond with superior quality. Every Nexus Diamond alternative has D graded color with Internally Flawless (IF) clarity and an Ideal Cut for maximum brilliance and fire. In this way, you can ensure that your diamond alternative will be perfectly colorless, but at a fraction of the cost. Our stones are also created so that they’ll never chip, crack, or become discolored or cloudy with normal wear. Our Lifetime Guarantee ensures that if anything does happen to your stone, we will replace it for free forever.

Three solitaire engagement rings in yellow, white and rose gold from Diamond Nexus

At Diamond Nexus, we believe that you shouldn’t have to compromise on quality if you’re on a budget or have to choose between having the ring of your dreams or an unforgettable honeymoon. Find a perfect diamond that fits in your budget and sparkles with the brilliance you’ve always pictured.



*Diamond Nexus strives to provide valuable information, while being clear and honest about our products. The Nexus Diamond™ alternative is a patented lab grown stone that, among all simulants, most closely imitates the look, weight and wear of a mined diamond, with two exceptions - it is absolutely perfect in every way, and it costs significantly less. Price points and environmental facts expressed in this blog were taken from popular online retailers and may vary. Learn more about the environmental impact of mining by visiting out blog: blog.