Pigeon's Blood • Pilgrimage to Mogok – Valley of Rubies • Lotus Gemology

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

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

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

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.

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

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.

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.

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.

The history of Thailand's famous relic.

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.