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Micro-Features of Ruby
Inclusions in Natural, Synthetic, and Treated Ruby

Provides a visual guide to the internal features of natural, synthetic, and treated rubies.

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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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Pieces of broken glass-filled ruby.
Durability of a Broken Glass-Filled Ruby

Heat treatment and glass filler are discovered in a ruby after it is broken during the jewelry setting process.

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Heat treatment of some pink sapphires
Article
Low-Temperature Heat Treatment of Mozambique Ruby

Report on changes in Mozambique ruby following low-temperature heating, observed using inclusion analysis, FTIR spectroscopy, and LA-ICP-MS.

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Ruby and Sapphire Production and Distribution: A Quarter Century of Change
Ruby and Sapphire Production and Distribution: A Quarter Century of Change

During the past 25 years, the corundum market has been transformed from one of medium to high-priced gems to one that encompasses nearly all price ranges.

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Article
Summer 2015 G&G: Dual-Stars, Photomicrography Guide, Rubies from Tajikistan, New Micro-World Section

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

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This 12.12 ct stone showed features associated with natural ruby.
An Unusual Filled Ruby

A red specimen, showing properties associated with Burmese ruby, shows a rare method of clarity enhancement.

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

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

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Natural Rubies with Glass-Filled Cavities

An examination and analysis of 15 natural rubies with glass-filled cavities.

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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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