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Spring 2015 G&G Examines Blue Spinel, Chinese Jewellery Design and the Latest in Synthetics

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

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Boron Carbide: A New Imitation Black Diamond

Specimen sold as black diamond identified as ceramic material commonly used in hard-plating applications

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Obtaining U.S. copyright registration for the Elara square cut-cornered brilliant diamond

The US Copyright Office granted what is believed to be the first copyright registration covering a gemstone design.

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Synthetic Moissanite: A New Diamond Substitute

Synthetic moissanite is much closer to diamond in overall appearance and heft than any previous diamond imitation; this article reports on how to identify and characterise it.

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Gemmological Properties of Near-Colourless Synthetic Diamonds

Examination of 51 colourless to near-colourless synthetic diamonds from all known sources of production confirms that they can be distinguished from similar-appearing natural diamonds on the basis of their gemmological properties.

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The GEM DiamondMaster and the Thermal Properties of Gems

Thermal properties and the potential applications of the GEM DiamondMaster in testing them.

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A Simple Approach to Detecting Diamond Simulants

Contrasting the physical properties of diamond with colourless specimens to identify the most problematic diamond simulants.

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Abstracts; Autumn 1991

This article, from the Autumn 1991 issue of Gems & Gemology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemology.

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