Article Search Results

Fluorescence produced by optical defects in diamond: measurement, characterisation and challenges

Yun Luo, July 24, 2013

How variations in UV lamp output can affect observed fluorescence colour and intensity.

Grey-To-Blue-To-Violet Hydrogen-Rich Diamonds from the Argyle Mine, Australia

Carolyn H. van der Bogert, Christopher P. Smith, Thomas Hainschwang, and Shane F. McClure

The Argyle diamond mine is the only known source of type IaB hydrogen- and nitrogen-rich diamonds coloured grey to blue to violet.

GemCad View of the French Blue Enclosed Within the Tavernier Blue

A Crystallographic Analysis of the Tavernier Blue Diamond

Scott D. Sucher, September 1, 2009

This study uses both historical information and modern data to create a computer model of the Tavernier Blue, orienting the finished diamond within the original diamond crystal.

Coloured Diamonds in the Aurora Butterfly of Peace Collection

The “Type” Classification System of Diamonds and Its Importance in Gemmology

Christopher M. Breeding and James E. Shigley, June 1, 2009

Knowledge of type allows gemmologists to better evaluate if a diamond might be treated or synthetic, and whether it should be sent to a laboratory for testing.

Treated-Colour Pink-To-Red Diamonds from Lucent Diamonds Inc.

Wuyi Wang, Christopher P. Smith, March 1, 2005

Using a multi-step process, Lucent Diamonds has developed a new treatment process for certain natural diamonds that creates colours from pink-purple to red to orangey brown.

De Beers near Colourless-to-Blue Experimental Gem-Quality Synthetic Diamonds

Marie-Line T. Rooney, C. M. Welbourn, March 1, 1993

De Beers has produced a faceted synthetic gem-quality diamond that could go unrecognised without careful gemmological testing.

Book Review: Handbook of Spectral Lines in Diamond, Volume 1: Tables and Interpretations

Bernhard Dischler, 467 pp., publ. by Springer-Verlag Berlin and Heidelberg GmbH & Co., Berlin; New York, 2012, US $120, October 19, 2013

By Bernhard Dischler, 467 pp., publ. by Springer-Verlag Berlin and Heidelberg GmbH & Co., Berlin; New York, 2012, US $120

Computer Rendering of the “French Blue” Diamond

The French Blue and the Hope: New Data from the Discovery of a Historical Lead Cast

François Farges, March 1, 2009

With the use of modern tools and technology, this article sheds light on the history and provenance of both the French Blue and the Hope diamonds.

Colour Grading of Coloured Diamonds in the GIA Gem Trade Laboratory

John M. King, Thomas M. Moses, December 1, 1994

How GIA’s Gem Trade Laboratory grades coloured diamonds, including an expanded colour grading terminology, is explained.

Abstract Header from the 2009 issue of Gems & Gemology

Abstracts; Autumn 2009

Brendan M. Laurs, Thomas W. Overton

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

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