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

Russell Shor, June 12, 2015

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

This 1.04 ct black submetallic round brilliant, initially represented as diamond, was identified as boron carbide. Photo by G. Choudhary.

Article

Boron Carbide: A New Imitation Black Diamond

Gagan Choudhary, September 13, 2013

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

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

Howard B. Rockman, September 1, 2003

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

Synthetic Moissanite: A New Diamond Substitute

Kurt Nassau, Shane F. McClure, December 1, 1997

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.

Gemmological Properties of Near-Colourless Synthetic Diamonds

James E. Shigley, Thomas M. Moses, March 1, 1997

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.

The GEM DiamondMaster and the Thermal Properties of Gems

D. B. Hoover, June 1, 1983

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

A Simple Approach to Detecting Diamond Simulants

Jill Hobbs, March 1, 1981

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

Abstracts; Autumn 1991

Dona M. Dirlam

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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