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.

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Articles (4)


Exceptional Pink to Red Diamonds: A Celebration of the 30th Argyle Diamond Tender

John King, James E. Shigley, and Claudia Jannucci, Jan 30, 2015

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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Physical properties
Physical properties

Study of the Blue Moon Diamond

Eloïse Gaillou, Jeffrey E. Post, Keal S. Byrne, and James E. Butler, Jan 30, 2015

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

Le Thi-Thu Huong, Wolfgang Hofmeister, Tobias Häger, Stefanos Karampelas, and Nguyen Duc-Trung Kien, Jan 30, 2015

Reports preliminary findings—based on FTIR and Raman spectrometry of more than 300 samples—on distinguishing natural and synthetic emeralds using vibrational spectroscopy.

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Regular Features

Lab notes
Lab Notes

The latest advances and findings from GIA laboratories.

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Gem News
Gem News International

Global coverage of gem sources, notable new gem materials, and recent industry developments.

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Book Review
Book Reviews

Your guide to the latest gem and jewelry books and other media.

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G&G readers respond.

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Vote before March 4 for the Dr. Edward J. Gübelin Most Valuable Article Awards. Ballots will be entered in a drawing for a one-year print subscription to G&G.

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