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Figure 1. This unheated 11.43 ct purplish red round ruby cabochon displayed a white double-star phenomenon. Photo by Nuttapol Kitdee.
Fireworks in Ruby

An unheated purplish red ruby cabochon displays a white double-star phenomenon.

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Brownish red staurolite crystal in ruby host.
Staurolite in Ruby

Conspicuous bright brownish red crystals in ruby matrix are the first recorded observations of staurolite in corundum.

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Figure 1. A handful of gem gravel collected from the Lofa River in Weasua, Liberia, showing the high concentration of ruby material. Photo courtesy of Diamonds for Peace.
Liberian Ruby

A trip to a rural Liberian diamond mining community results in a newly discovered source of corundum.

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Ruby Article
Ruby Description

Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire.

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Article
Ruby Journey

Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire

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Needle-like sillimanite inclusions in ruby
Sillimanite in Ruby

Unusual needle-like inclusions in ruby were identified as sillimanite.

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General Content
Ruby Bibliography

This bibliography has been prepared as an aid for people interested in ruby. It is a selection of citations to books and gemology journal articles that discuss ruby, including its identification, mining localities, synthetics, treatments, and history.

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Trapiche Rubies

Ruby crystals from Southeast Asia with a fixed six-rayed star, similar in effect to trapiche emeralds from Colombia, are described.

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Ruby in Diamond

The first substantiated identification of corundum (var. ruby) occurring as an inclusion in natural diamond is presented.

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Article
The Royal Ruby

Ancient Indians called it “the king of precious stones.” Burmese warriors thought it made them invulnerable in battle. Medieval Europeans believed it cured hemorrhages and inflammatory diseases. The ruby has been prized since ancient times. And we still cherish it today.

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