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A Selection of Faceted Natural Ametrines.
Using Conventional Equipment to Separate Natural from Synthetic Ametrine

A summary of the article “A simple approach to separate natural from synthetic ametrine,” by Francine Payette.

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HOC synthetic alexandrite inclusion.
Challenges in Orienting Alexandrite: The Usambara and Other Optical Effects in Synthetic HOC-Grown Russian Alexandrite

Overview and commentary on the 2013 Journal of Gemmology article “Synthetic alexandrites grown by the HOC method in Russia: Internal features related to the growth technique and colorimetric investigation.”

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Titanium-Bearing Synthetic Alexandrite and Chrysoberyl

Overview and commentary on the 2013 Journal of Gemmology article “Titanium-Bearing Synthetic Alexandrite and Chrysoberyl.”

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Letters: Note on CVD Synthetic Overgrowth

A response to the Summer 2017 Lab Note on CVD synthetic overgrowth on a natural diamond.

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Letters: Trapiche Nomenclature

A response to the Fall 2015 G&G article on trapiche emerald from Colombia.

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Letters: Analysis of Three-Phase Inclusions in Emerald

A response to the Summer 2014 G&G article on three-phase inclusions in emerald.

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Letters: Nacken Synthetic Emeralds: Additional Information

New developments relating to the Winter 2016 article on synthetic emeralds grown by Prof. Richard Nacken.

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Abstracts; Summer 2006

This article, from the Summer 2006 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

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Abstracts; Fall 2006

This article, from the Fall 2006 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

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Colorless CVD-Grown Synthetic Diamond
Diamond Laser

Overview and commentary on the 2014 Optics & Photonics News article “Diamond Raman Lasers.”

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