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Beryllium Diffusion of Ruby and Sapphire

The heat treatment of corundum involving lattice diffusion of beryllium (Be) at temperatures over 1800°C has become a major issue in the gem trade.

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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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Heat Treating the Sapphires of Rock Creek, Montana

Renewed interest in large-scale commercial mining of Montana sapphires motivated a detailed study of the heat treatment of sapphire from the Rock Creek deposit.

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Sapphires from Australia

An overview of Australia's recent significance in the production of blue sapphire.

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Heat Treating Corundum: The Bangkok Operation

An overview of the potential effects that heat treatment can have on corundum.

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Heat Treating Ruby and Sapphire: Technical Aspects

A review of heat treatment methods available for use on natural or synthetic corundum.

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Diagnostic Features and Heat Treatment of Kashmir Sapphires

Today, only by combining different gemmological tests with years of practical experience, can a conclusive determination of the origin of a sapphire be made.

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The Identification of Blue Diffusion-Treated Sapphires

Blue diffusion-treated sapphires are becoming more prevalent than ever before.

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The Chanthaburi-Trat Gem Field, Thailand

Thailand has become the world's major source of gem ruby.

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Update on Diffusion-Treated Corundum: Red and Other Colours

Blue diffusion-treated sapphires have become a subject of considerable controversy since their introduction in significant quantities a few years ago.

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