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the quarterly journal of the gemological institute of america
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the quarterly journal of the gemological institute of america
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The Beauty of Natural Green Diamonds
Duncan Pay, Editor-in-Chief
An overview of the Spring 2018 Gems & Gemology content.
Articles (3)
![Identification](https://www.gia.edu/images/1495261339632/G-G-SP18-Cover-216x122.jpg)
Natural-Color Green Diamonds: A Beautiful Conundrum
Characterizes diamonds with exceptionally rare natural green color, based on GIA’s extensive database of samples.
Read More![Optical Effects](https://www.gia.edu/images/SP18-rainbow-hematite-fig1-229456-216px.jpg)
Iridescence in Metamorphic “Rainbow” Hematite
Analyzes the substructures that cause the intense iridescence observed in “rainbow” hematite from Minas Gerais, Brazil.
Read More![Identification](https://www.gia.edu/images/SP18-Saruwatari-Figure-1-229461-216x122.jpg)
DNA Techniques Applied to the Identification of Pinctada Fucata Pearls from Uwajima, Ehime Prefecture, Japan
Shows how genetic material extracted from small amounts of pearl powder can be a useful indicator of this akoya cultured pearl species.
Read MoreRegular Features
![Lab Notes](https://www.gia.edu/images/lab-notes-landing-page-300x169.jpg)
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![Gem News](https://www.gia.edu/images/gni-landing-page-300x169.jpg)
Gem News International
Global coverage of gem sources, notable new gem materials, and recent industry developments.
View All (32)![Book Review](https://www.gia.edu/images/147796_book.jpg)
MOST VALUABLE ARTICLE AWARD
![Most Valuable Article 1st Place Tao Hsu](https://www.gia.edu/images/1st-MVA-Tao-Hsu-130x130.png)
Big Sky Country Sapphire: Visiting Montana’s Alluvial Deposits
Tao Hsu, Andrew Lucas, Robert E. Kane, Shane F. McClure, and Nathan D. Renfro
![Most Valuable Article 2nd Place Darwin Fortaleche](https://www.gia.edu/images/2nd-MVA-Darwin-Fortaleche-130x130.png)
Colombian Emerald Industry: Winds of Change
Darwin Fortaleché, Andrew Lucas, Jonathan Muyal, Tao Hsu, and Pedro Padua
![Most Valuable Article 3rd Place Xiaoyan Feng](https://www.gia.edu/images/3rd-MVA-Xiaoyan-Feng-130x130.png)
Characterization of Mg and Fe Contents in Nephrite Using Raman Spectroscopy
Xiaoyan Feng, Yong Zhang, Taijin Lu, and Hui Zhang
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past gems & gemology issues
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