the quarterly journal of the gemological institute of america
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the quarterly journal of the gemological institute of america
A Fitting Conclusion to Our 80th Anniversary
By Duncan Pay, Editor-in-Chief
Our lead article discusses the sweeping changes brought to rough diamond pricing and supply through the adoption of tenders and live auctions.
Articles (4)
Exceptional Pink to Red Diamonds: A Celebration of the 30th Argyle Diamond Tender
Describes the extremely rare polished pink diamonds from Australia’s Argyle mine that have been sold for 30 years through invitation-only tenders.
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Rough Diamond Auctions: Sweeping Changes In Pricing and Distribution
Examines the growing percentage of rough diamonds being sold through auctions, a shift that has caused price volatility while opening up supply to more manufacturers and dealers.
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Study of the Blue Moon Diamond
Presents spectroscopic and phosphorescence data of the Blue Moon, a 12.03 ct Fancy Vivid blue diamond discovered at the historic Cullinan mine in early 2014.
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A Preliminary Study on the Separation of Natural and Synthetic Emeralds Using Vibrational Spectroscopy
Reports preliminary findings—based on FTIR and Raman spectrometry of more than 300 samples—on distinguishing natural and synthetic emeralds using vibrational spectroscopy.
Read MoreRegular Features
Gem News International
Global coverage of gem sources, notable new gem materials, and recent industry developments.
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MOST VALUABLE ARTICLE AWARD
Recent Advances in Understanding the Geology of Diamonds
Steven B. Shirey and James E. Shigley
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