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Abstracts; Summer 1991

Dona M. Dirlam

From the Summer 1991 issue of Gems & Gemmology, a summary of important gemmology-related articles published in other journals.

The Separation of Natural from Synthetic Emeralds by Infrared Spectroscopy

Carol M. Stockton, June 1, 1987

The technique is nondestructive and, with Fourier transform instrumentation, extremely rapid in comparison to most laboratory methods.

Unusual Curved Colour Zoning In Emerald

Nathan Renfro, Vincent Pardieu, and Supharart Sangsawong, GIA, July 1, 2013

A report on a 1.17 ct emerald obtained in Kabul, Afghanistan for GIA's permanent reference collection

Emeralds from the Ural Mountains, USSR

Karl Schmetzer, Heinz-Jürgen Bernhardt, June 1, 1991

Emeralds are again being mined in the historic district of the Ural Mountains. Physical, chemical, spectroscopic and microscopic characteristics of stones from the recent production are presented and compared with data on older samples as well as those reported in the literature.

Three-Phase Inclusions in Emerald and Their Impact on Origin Determination

Sudarat Saeseaw, Vincent Pardieu, and Supharat Sangsawong, July 25, 2014

Discusses the role of three-phase inclusions in emerald, in combination with spectroscopy and trace-element analysis, in determining geographic origin.

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

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Autumn 2015 G&G: Trapiche Emeralds, Synthetic Diamonds and a Large Diamond Source

Russell Shor, November 4, 2015

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

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