Most people picture a diamond as clear and colorless, but nature also produces diamonds in shades of pink, blue, yellow, green, orange, and even red. These are known as fancy colored diamonds, and they follow a completely different set of rules than the traditional white diamonds most shoppers are used to. If you are curious about what makes these stones so rare, so valuable, and so different to grade, this guide walks through what you actually need to know before buying one.
What Makes a Diamond Fancy Colored
According to the Gemological Institute of America, only about one in 10,000 diamonds has a fancy color. That rarity alone sets these stones apart from the nearly colorless diamonds most people are familiar with. Color in a diamond comes from trace elements or structural differences that occurred naturally while the stone was forming deep in the earth. For example, the GIA notes that less than one boron atom per million carbon atoms can be enough to give a diamond a blue color, which shows just how small a shift is needed to produce a dramatic result.
How Fancy Color Diamonds Are Graded Differently
Traditional colorless diamonds are graded on the D to Z scale, where the closer a stone is to being completely colorless, the more valuable it is considered. Fancy color diamonds work in reverse. The GIA explains that value generally increases with the strength and purity of the color, meaning a deep, vivid hue is typically worth more than a pale or muted version of the same color. Grading also considers hue, tone, and saturation together rather than judging the stone against a colorless standard.
Why Some Colors Are Rarer Than Others
Not all fancy colors occur with the same frequency. Pink, blue, and green are considered among the most valuable hues, according to the GIA, and slight differences in color can meaningfully affect a stone value. Red diamonds are in a category of their own. The GIA notes that red diamonds are so rare that only a handful are known to exist, which places them among the most sought after gems in the world. Yellow and brown fancy diamonds, by comparison, occur more frequently and tend to be more accessible for everyday buyers.
Clarity and Cut Considerations
One of the more surprising aspects of fancy color diamonds is how differently clarity is treated. The GIA points out that even diamonds with a lower clarity grade are still prized by connoisseurs if the color itself is attractive, since color is the primary driver of value rather than clarity. Cut choices also differ from colorless diamonds. Fancy shapes such as radiant cuts are commonly used because they help maximize the intensity and visual impact of the color, rather than being chosen purely for brilliance the way a round brilliant cut is for a colorless stone.
Carat Weight and Value
Size matters less in isolation for fancy color diamonds than it does for colorless ones. According to the GIA, even fancy color diamonds under a carat in shades like pink, blue, green, and orange can be rare and valuable if the color quality is strong enough. This is part of why two fancy color diamonds of a similar size can have very different price points depending entirely on the depth and purity of their color.
Famous Fancy Color Diamonds
A few fancy color diamonds have become famous well beyond the jewelry world. The Pink Star diamond, a 59.60 carat stone, became the most expensive gem ever sold at auction when it reached 71.2 million dollars in April 2017, according to the GIA. The Hope Diamond, a 45.52 carat Fancy Deep grayish blue diamond, is widely regarded as the most famous gem in the world. These stones illustrate just how extraordinary a large, high quality fancy color diamond can be.
What to Look for When Buying
When shopping for a fancy color diamond, pay close attention to how the color is described on the grading report, since terms like Fancy, Fancy Intense, and Fancy Vivid indicate increasing strength of color. Look at the stone in different lighting conditions, since fancy colors can shift in appearance depending on the light source. It also helps to view the stone in person or through detailed video whenever possible, since photographs do not always capture the true depth of a fancy color accurately. Working with a jeweler who can explain the grading report in plain terms makes the process much easier for a first time buyer.
Frequently Asked Questions
Are fancy colored diamonds natural or treated. Many fancy colored diamonds are entirely natural, though some diamonds undergo treatments to alter or enhance their color. A grading report from a reputable lab will typically note whether a stone has been treated.
What is the rarest diamond color. Red is widely considered the rarest diamond color, with only a small number of natural red diamonds known to exist.
Do fancy colored diamonds cost more than white diamonds. It depends on the specific stone, but large, vivid fancy colored diamonds are often significantly more valuable than a colorless diamond of similar size, particularly for rare hues like pink, blue, and red.
Can fancy colored diamonds be used in engagement rings. Yes. Fancy colored diamonds are increasingly popular choices for engagement rings, offering a distinctive look compared to a traditional colorless stone.
Final Thoughts
Fancy colored diamonds offer something a traditional colorless diamond simply cannot, a genuinely rare and individual piece of natural history. Understanding how these stones are graded, why certain colors command higher prices, and what to look for on a grading report puts you in a much stronger position when shopping for one. Whether you are drawn to a soft pink hue or a deep, saturated blue, taking the time to learn the basics helps ensure you choose a stone you will value for years to come.
At Bliss Diamond, you can browse our colored diamonds collection to see rare fancy color stones in person.