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Ruby
Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire.
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Ruby and Sapphire from the Southern Ural Mountains, Russia
Primary occurrences of ruby, pink sapphire, sapphires of other colors, and spinel have been found in marbles in the Ural Mountains.
Status of Ruby and Sapphire Mining in the Mogok Stone Tract
Burma, now named Myanmar, has for centuries been considered the world's preeminent source of fine rubies.
Carbon Dioxide Fluid Inclusions as Proof of Natural-Colored Corundum
An important clue in identifying natural-colored corundum is the presence of carbon dioxide fluid inclusions.
The Rubies of Burma: A Review of the Mogok Stone Tract
A review of the history of this area, its geology, and the mining methods that have predominated.
The Chanthaburi-Trat Gem Field, Thailand
Thailand has become the world's major source of gem ruby.
Sri Lanka: The Gem Island
An overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.
Heat Treating Ruby and Sapphire: Technical Aspects
A review of heat treatment methods available for use on natural or synthetic corundum.
Ruby and Sapphire from Muling, China
An emerging corundum deposit in northeastern China is discussed.
Translucent Ruby Filled with Zinc Glass
Natural Rubies with Glass-Filled Cavities
Separating Glass-Filled Rubies Using the DiamondView
The DiamondView instrument is able to identify glass as the filler in a pair of heart-shaped rubies.
