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Fluorescence image of Aurora Butterfly of Peace
An Introduction to Photoluminescence Spectroscopy for Diamond and Its Applications in Gemmology

Presents the underlying physics and methodology of this analytical technique, which has become an essential tool in identifying treated and synthetic diamonds.

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

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

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Nanocut Plasmaetched Diamonds
Cutting Diffraction Gratings to Improve Dispersion (“Fire”) in Diamonds

A new microlithography process developed to create high-resolution diffraction grating patterns on portions of certain facets can improve the dispersion of light and thus the amount of “fire” in a diamond.

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Coloured Diamonds in the Aurora Butterfly of Peace Collection
The “Type” Classification System of Diamonds and Its Importance in Gemmology

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.

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

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

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

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

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Gemstone Durability: Design to Display

A treatise on the design, display, care and repair of fine gemstones.

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Marine mining of diamonds off the west coast of Southern Africa
Marine mining of diamonds off the west coast of Southern Africa

It is anticipated that production of diamonds from the sea will increase substantially in the future.

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New Filling Material for Diamonds from Oved Diamond Company: A Preliminary Study

The Oved Diamond Company’s new glass formulation is tested with mixed results.

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0.20-ct Diamond
A Visual Guide to the Identification of Filled Diamonds

This article illustrates the various features in filled diamonds and explores the best techniques for examining them.

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