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The GIA Diamond Origin Report: Diamond Traceability Based on Science

Find out more about the GIA Diamond Origin Report service which includes a country of origin opinion for eligible diamonds.

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 Seasonal Sales Despite Concerns; Sotheby’s Hong Kong Auction Sales

Russell Shor, October 21, 2019

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

A row of various shaped cut and polished pink diamonds.

Article

Why are Pink Diamonds Pink? GIA Researchers Dive Deep into their Crystal Structure

Russell Shor, October 18, 2019

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

A truck travel the circular roadways of the large mine.

Article

US Consumer Confidence Remains Strong; Alluvial Diamond Tracking and Illegal Gold

Russell Shor, September 23, 2019

US consumer confidence has kept the economy from sliding into a possible recession. Plus: Sustainable trends for diamonds and gold.

Understanding microscopic structures sheds light on the appearance and characteristics (such as lustre and hardness) of pearls and shells.

Article

Crystallographic Orientation of Biogenic Aragonite in Pearls

Ren Lu, April 8, 2009

Explores the potential of laser Raman spectroscopy for material identification in pearls as well as determining the orientation of their biogenic mineral growth.