Editorial
Trapiche and More...
By Duncan Pay, Editor-in-Chief


A gemological curiosity or an object of beauty in its own right?

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Articles (4)

Synthetics
Synthetics

Large Colorless HPHT Synthetic Diamonds from New Diamond Technology

Ulrika F.S. D’Haenens-Johansson, Andrey Katrusha, Kyaw Soe Moe, Paul Johnsonand Wuyi Wang, Nov 23, 2015

Examines a new source of colorless and near-colorless gem-quality HPHT synthetic diamonds using spectroscopic and gemological analysis.

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Localities
Localities

Letseng’s Unique Diamond Proposition

Russell Shor, Robert Weldon, A.J.A. (Bram) Janse, Christopher M. Breedingand Steven B. Shirey, Nov 23, 2015

Explores the history, geology, and current production of this unique source of large diamonds.

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Techniques
Techniques

Origin Determination of Dolomite-Related White Nephrite through IB-LDA

Zemin Luo, Mingxing Yangand Andy H. Shen, Nov 23, 2015

A technique for origin identification based on statistical analysis and LA-ICP-MS spectrometry.

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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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Micro-World

An in-depth look at the hidden world of gem inclusions.

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Book Review
Reviews

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

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2015
G&G CHALLENGE WINNERS

Congratulations to the readers who earned a perfect score on this year's Challenge quiz.

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