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Research
Gemstones in the Era of the Taj Mahal and the Mughals
A look at the gem ornamentation of this landmark, as well as the jewels of the Mughal dynasty.
Hydrogen-Rich Green Diamond Color-Treated by Multi-Step Processing
Characterization of an intense yellowish green faceted diamond revealed a complex treatment process.
Natural-Color Fancy White and Fancy Black Diamonds: Where Color and Clarity Converge
A systematic study of the properties of approximately 500 Fancy white and 1,200 Fancy black diamonds.
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.
Bullish Predictions for 2019 Holiday Sales Despite Concerns, Sotheby’s Hong Kong Auction Sales
U.S. holiday sales predictions look good. Sotheby’s Hong Kong auction features GIA alumna pieces.
US Consumer Confidence Remains Strong; Alluvial Diamond Tracking and Illegal Gold
U.S. consumer confidence has kept the economy from sliding into a possible recession.
US Government to Industry: Know Your Supply Chain; De Beers, Alrosa Cut Rough Sales
State department tells industry it is not doing a good job tightening chain of custody reporting.
Kimberlites: Earth’s Diamond Delivery System
Examines the basic characteristics of kimberlites and their relationship with diamonds.
Alum’s Lifelong Quest: Searching for Jewelry Unicorns
Alan Nacht continues his family’s legacy - Bernard Nacht & Co. – and his quest for unforgettable jewelry.
Chow Tai Fook Expands Blockchain Initiative with GIA
Chow Tai Fook and GIA offer secure digital blockchain reports that document the diamond journey and grading information in one place.
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.
Jewels of Hollywood: Accessories and Jewelry that Made the Stars Shine
“Jewels of Hollywood,” on loan from the Kazanjian Foundation, showcases some of the jewelry and accessories associated with Hollywood royalty.
