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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.
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.
Coronavirus May Cut Chinese Demand, Diamond Companies See Better Times
Economic impact of the coronavirus. Plus, an update on the diamond market and gold jewelry.
What Country Do My Diamonds and Other Gemstones Come From?
Dr. James Shigley shares how GIA determines colored stone origin and the mysteries of diamonds origin.
GIA Researchers Reveal the Secrets to Diamond-in-a-Diamond Mystery
GIA researchers in NY recently had the opportunity to examine one of the most interesting and unique diamond crystals ever found.
The Curious Life of Patrick O’Shea: From Ballistics Detective to Gemologist and Jewelry Designer
Patrick O’Shea’s life’s journey has led him down many career paths until they all came together as a designer who specializes in masonic jewelry.
2019 in Review: Diamond Trade Begins Recovery, Jewelry Retail Blooms Late, Extraordinary Auction Sales
World’s two largest diamond producers say market is stabilizing after severe cutbacks in rough sales.
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.
Diamond Market in Recovery, Top-end Auction Results
World’s two largest diamond producers say market is stabilizing after severe cutbacks in rough sales.
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.
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.
Hydrogen-Rich Green Diamond Color-Treated by Multi-Step Processing
Characterization of an intense yellowish green faceted diamond revealed a complex treatment process.
