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Fancy Color Diamond

Dazzling brilliance. Captivating color. The planet’s most valued gems are fancy color diamonds.

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Radiant Cut

The radiant cutting style helps intensify a fancy colored diamond’s color.

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Beyond Z

Diamonds with more yellow than GIA’s Z grade are considered fancy color.

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Color is Value

Subtle color differences impact the value of a fancy colored diamond.

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Octahedral Form

Beautifully formed octahedrons might become collectors' treasures.

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Crystal Faces

Diamond crystal faces show cutters how to get the best weight retention.

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Uneven Color

The color in rough diamond might not be evenly distributed in the rough.

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About Fancy Color Diamond

About Fancy Color Diamond

Gem diamonds in GIA’s D-to-Z range usually decrease in value as the color becomes more obvious. Just the opposite happens with fancy color diamonds: Their value generally increases with the strength and purity of the color. Large, vivid fancy color diamonds are extremely rare and very valuable. However, many fancy diamond colors are muted rather than pure and strong.

Fancy Color Diamond Description

Fancy Color Diamond History and Lore

Birthstones & Anniversaries

Diamond is the birthstone for April and the gem of the 10th and 60th anniversaries. Fancy color diamond adds a unique twist to your celebration.

1 in 10,000

Only one in 10,000 diamonds has a fancy color.

$71.2 million

In April 2017, the Pink Star diamond,
59.60 carats, became the most expensive
gem ever auctioned.

Hope Diamond

The 45.52-carat Fancy Deep grayish blue Hope Diamond is the world’s most famous gem.


  • Mineral:   Diamond
  • Chemistry:   C
  • Color: All colors
  • Refractive index: 2.42
  • Birefringence: None
  • Specific gravity:   3.52
  • Mohs Hardness: 10


There are a number of processes used to alter the color, apparent clarity, or improve the durability of gems.

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Some gemstones have synthetic counterparts that have essentially the same chemical, physical, and optical properties, but are grown by man in a laboratory.

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Any gem can be imitated—sometimes by manmade materials or by natural materials chosen by man to impersonate a particular gem.

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gem love

Why We Love This Gemstone

Rarest of the rare

Fancy color diamonds are the rarest of the rare. Each is one of a kind.


Red diamonds are so rare that only a handful are known to exist.


Less than one boron atom per million of carbon atoms can give a diamond a blue color.

Quality Factors

Strength and purity of color influence a fancy color diamond’s value.


quality factors

The most valuable hues are pink, blue, and green. Slight color differences can impact value.


quality factors

Even diamonds with a low clarity grade are prized by connoisseurs if their color is attractive.


quality factors

Fancy shapes like radiant cuts are commonly used to maximize the intensity of the color.

Carat Weight

quality factors

In pink, blue, green and orange, even fancy color diamonds below a carat are rare and valuable.

Fancy Color Diamond Quality Factors: The Comprehensive Guide


Explore sources, gemological research, and the role of gems in history.

A blue diamond with inclusions under the table is held up in tweezers.

Where Do Blue Diamonds Come From?

Blue Diamonds Have a Surprising “Superdeep” Origin and a Link to Ancient Oceans

Evan M. Smith , Aug 1, 2018 Read Article
G&G Winter 2018 Cover

Natural-Color Pink, Purple, Red, and Brown Diamonds: Band of Many Colors

Sally Eaton-Magaña, Troy Ardon, Karen V. Smit, Christopher M. Breeding, and James E. Shigley , Feb 1, 2019 Read Article
Recently discovered and legendary diamonds in the blue/gray/violet color range

Natural-Color Blue, Gray, and Violet Diamonds: Allure of the Deep

Sally Eaton-Magaña, Christopher M. Breeding, and James E. Shigley , Aug 6, 2018 Read Article
Fancy Vivid yellow diamond

Very Large Irradiated Yellow Diamond

Wuyi Wang , Jan 30, 2015 Read Article