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.
Birthstones & AnniversariesDiamond 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.
In April 2017, the Pink Star diamond,
59.60 carats, became the most expensive
gem ever auctioned.
The 45.52-carat Fancy Deep grayish blue Hope Diamond is the world’s most famous gem.
- Mohs Hardness: 10
There are a number of processes used to alter the color, apparent clarity, or improve the durability of gems.Learn More
Some gemstones have synthetic counterparts that have essentially the same chemical, physical, and optical properties, but are grown by man in a laboratory.Learn More
Any gem can be imitated—sometimes by manmade materials or by natural materials chosen by man to impersonate a particular gem.Learn More
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.
Strength and purity of color influence a fancy color diamond’s value.
The most valuable hues are pink, blue, and green. Slight color differences can impact value.
Even diamonds with a low clarity grade are prized by connoisseurs if their color is attractive.
Fancy shapes like radiant cuts are commonly used to maximize the intensity of the color.
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.
Where Do Blue Diamonds Come From?
Blue Diamonds Have a Surprising “Superdeep” Origin and a Link to Ancient OceansEvan M. Smith , Aug 1, 2018 Read Article
Natural-Color Pink, Purple, Red, and Brown Diamonds: Band of Many ColorsSally Eaton-Magaña, Troy Ardon, Karen V. Smit, Christopher M. Breeding, and James E. Shigley , Feb 1, 2019 Read Article
Natural-Color Blue, Gray, and Violet Diamonds: Allure of the DeepSally Eaton-Magaña, Christopher M. Breeding, and James E. Shigley , Aug 6, 2018 Read Article
Collecting and Classifying Coloured Diamonds: an Illustrated Study of the Aurora Collection
Stephen C. Hofer
The Fancy Color Diamond Book: Facts & Secrets of Trading in Rarities
Forever Brilliant: the Aurora Collection of Colored Diamonds
Alan Bronstein and Stephen C. Hofer