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Pyrope Garnet and Montana Sapphires Highlight Winter 2015 G&G

G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.

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Eight HPHT faceted synthetic diamonds from AOTC Group
Near-Colorless HPHT Synthetic Diamonds from AOTC Group

Presents the gemological and spectroscopic properties of a suite of synthetic diamonds grown by AOTC using high pressure and high temperature.

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Man Sin mining
Hunting for
“Jedi” Spinels in Mogok

Documents a series of visits to Myanmar in search of exceptionally bright pinkish red spinels possessing no dark tones.

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The Seven Types of Yellow Sapphire and Their Stability to Light

The authors determined that there are actually seven types of "yellow" sapphire on the market today, which differ in the cause of color and the stability of the color to light.

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Abstract Header from the 2009 issue of Gems & Gemology
Abstracts; Winter 2009

This article, from the Winter 2009 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

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Cultured pearl prepped for analysis
A Look Inside a Remarkably Large Beaded South Sea Cultured Pearl

A study of the nacre and the cavity of a large Pinctada maxima cultured pearl yields a theory on the specimen’s formation.

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Blue Sapphires from the Baw Mar Mine in Mogok

Reports on the microscopic, chemical, and spectroscopic features that differentiate the high-quality Baw Mar sapphire from “classic” gem-quality Burmese sapphire.

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Article
Sapphire Series Part 2: The Next Generation of Sapphire Crystal Growth Techniques

The second in the series, "Sapphire: A Crystal With Many Facets," this article looks at several advanced growth techniques.

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Article
Decades-Old Synthetic Alexandrite Sheds Light on Modern-Day Research Needs

An overview and commentary on the 2012 Journal of Gemmology article, “Flux-grown synthetic alexandrites from Creative Crystals Inc.”

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