Back to gem encyclopedia

Fancy Color Diamond

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

Responsive image
Radiant Cut

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

Responsive image
Beyond Z

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

Responsive image
Color is Value

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

Responsive image
Responsive image
Octahedral Form

Beautifully formed octahedrons might become collectors' treasures.

Responsive image
Crystal Faces

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

Responsive image
Uneven Color

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

Responsive image
Tools

Research

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.

Read More

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.

Read More

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.

Read More

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.

Read More

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.

Read More

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.

Read More

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.

Read More

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.

Read More

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.

Read More

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.

Read More