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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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Tools

Research

Colorless diamond ring
Natural-Color D-to-Z Diamonds: A Crystal-Clear Perspective

Examines a very large dataset of colorless to near-colorless diamonds submitted to GIA and evaluates their diamond type and spectroscopic properties.

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Yellow and orange diamonds
Naturally Colored Yellow and Orange Gem Diamonds: The Nitrogen Factor

Presents the four major groups of defects responsible for the color in nearly all yellow and orange diamonds.

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Green diamond crystal.
Diamond with Mobile Green Diamond Inclusion

Green octahedral diamond crystal inclusion freely moves inside a negative crystal contained in the colorless host diamond.

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Three men at a conference table.
Article
A Look Back — and Forward — After 40 Years in the Gem and Jewelry Industry

Russell Shor reflects on the people, gems and stories he’s encountered as he’s covered the industry over the years.

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A large yellow cushion cut diamond pendant is partially framed with marquis cut diamonds and hangs from a necklace of mixed cut diamonds.
Article
Yellow Gemstones: Can You Identify Them?

Don’t judge a yellow gem by its color alone. A variety of gemstones also come in shades of yellow, from diamonds to citrine to garnets.

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Head shots of a man and woman.
Article
Diamond Lattice Defects: GIA Researchers Explore Internal Tagging and Gray-Blue-Violet Diamond Color

GIA scientists recently presented their latest research on diamond tagging and the cause of gray-blue-violet color in diamonds.

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Two people walk past a Kay Jewelers storefront.
Article
Jewelry Sales Show Modest Rise; Higher End Soars

U.S. holiday jewelry sales increased slightly from 2018. Online buying surged, while foot traffic in retail stores slowed.

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A multi-diamond brooch.
Article
2019 in Review: Diamond Trade Begins Recovery, Jewelry Retail Blooms Late, Extraordinary Auction Sales

2019: A year of ups and downs in the gem and jewelry industry, including diamonds, retail, auction sales and laboratory-grown diamonds.

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A face-up view of a cushion cut diamond with blue color.
Article
Gems & Gemology’s 7 Most Unusual Encounters from 2019

Check out some of the most interesting and unusual diamonds and colored stones submitted to GIA’s laboratories in 2019.

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A rectangular cut Fancy Deep blue diamond is framed by two pear shaped diamonds.
Article
Diamond Market in Recovery, Top-end Auction Results

World’s two largest diamond producers say market is stabilizing after several months of severe cutbacks in rough sales. Christie’s and Sotheby’s sales.

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