by Richard W. Hughes
Pigeon's Blood • A Pilgrimage to Mogok – Valley of Rubies

The author makes his first pilgrimmage to Burma's Mogok Stone Tract.

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by Richard W. Hughes
Burma's Jade Mines • A History

The history of Burma's jade mines, as seen through Western eyes, from the earliest accounts through World War II.

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by John I. Koivula & Richard W. Hughes
Focus on the Spectroscope


Many gemologists have difficulty mastering the direct-vision spectroscope. This article eases the pain.

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by Richard W. Hughes
Moontown • A History of Chanthaburi, Thailand, and Pailin, Cambodia

The Thai city of Chanthaburi (จันทบุรี) may be small, but it has played an important role in both the history of Thailand and the gem trade. Taking its name from the Sanskrit word for moon ('chan'), this petite town is among the most charming in the Land of Smiles.

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by Richard W. Hughes
The Black Prince's Ruby • Blood-Red Souvenir of Conquest

The history of the Black Prince's Ruby, one of the world's most famous precious stones.

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by Richard W. Hughes
Brilliance, Windows, and Extinction in Gemstones

A discussion of brilliance, windows and extinction as they relate to the face-up appearance of colored gemstones. Diagrams demonstrate that extinction is largely a function of cut.

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by Richard W. Hughes & John I. Koivula
Dangerous Curves • A Reexamination of Verneuil Synthetic Corundum

Virtually all gemologists are aware of the curved growth lines and gas bubbles in Verneuil (flame-fusion) synthetic corundum, but few understand exactly why they occur and how they are distributed in these stones. This article clarifies these important identifying features.

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by Richard W. Hughes
Jade Buying Guide • LotusGemology.com

This article discusses the factors that influence quality and what to look for when buying both jadeite and nephrite. A list of jade auction records is also included.

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by Richard W. Hughes, Olivier Galibert, George Bosshart, Fred Ward, Thet Oo, Mark Smith, Tay Thye Sun & George Harlow
Burmese Jade  |  The Inscrutable Gem

Myanmar's jadeite mines occupy a privileged place, representing the planet's principal source of fine jadeite jade. This article covers the deposits themselves, along with the cutting, grading and trading of jadeite.

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