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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

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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A row of various shaped cut and polished pink diamonds.
Article
Why are Pink Diamonds Pink? GIA Researchers Dive Deep into their Crystal Structure

GIA researchers analyzed more than 90,000 natural pink diamonds to better understand how these rare and beautiful diamonds formed and got their color.

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A diamond necklace that features a 100.02 Fancy Intense yellow diamond. The pendant is done in the shape of a musical instrument.
Article
Bullish Predictions for 2019 Holiday Sales Despite Concerns, Sotheby’s Hong Kong Auction Sales

U.S. holiday sales predictions are better than expected. Sotheby’s Hong Kong auction features a 100 ct yellow diamond necklace by GIA alumna Anna Hu.

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The octopus head is a baroque Tahitian cultured pearl and its arms are made of black, yellow and white diamond (in a striped pattern) set in black-plated 18K gold.
Article
A Tropical Paradise of Ocean-Inspired Jewelry and Gemstones

Escape to a warm-water paradise in your mind with these jewels that formed in the sea, are inspired by marine life and evoke the ocean’s essence.

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Six different shaped red and pink diamonds lined up in a row.
Article
Bank Suspends Credit for ‘Unprofitable’ Rough Diamonds

De Beers and Alrosa slashed rough diamond sales after ABN AMRO’s says it will no longer finance rough purchases for goods that can’t be cut profitably.

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A wide choker-style necklace of a row of emeralds with rows of diamonds above and below the emeralds.
Article
Spring 2019 Auctions: Premium Prices for Historic Pieces

Gemstones and jewels with historical provenance are bringing the best prices at the spring 2019 auctions.

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People meet and mingle at the entrance to the JCK Show.
Article
Headwinds Slow 2019 Vegas Business, Lab-grown Diamonds Proliferate

Decent demand for finished jewelry, but less for loose gems. Plus: Lab-grown diamonds and responsible, sustainable business practices.

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The entrance to the GemGenève show featured a large graphic wall.
Article
Trade Hopes for a Bright 2019 Vegas Show

All eyes are on the upcoming jewelry sales events in the U.S. – the Luxury and JCK shows in Las Vegas – as business slows in other parts of the world.

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Rough diamond, yellow in color
Article
Diamond Research Gives Clues to the Formation of the Continents

Mineral inclusions trapped in diamonds reveal the continents’ construction – and helps GIA researchers date diamonds.

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A model holds a large cut-corner square diamond with three fingers.
Article
De Beers Ups Supply, FTC Warns About ‘Eco’ Claims

DeBeers responds to fluctuations, and the FTC issues warnings on laboratory-grown diamonds. Plus: 302.37 ct Graff Lesedi La Rona is revealed.

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