Greasy Business • The Ongoing Fraud of Oiled Gems

Billie Hughes & Wim Vertriest report the results from their low-temperature heat treatment experiments on Burmese ruby.

Hands-on workshop looking at different types of jade, including both nephrite and fei cui.

Billie Hughes and Olivier Segura discuss inclusions in colored gemstones and diamonds at an Evening Conversation for L'École School of Jewelry Arts, Van Cleef & Arpels.

Billie Hughes and Olivier Segura discuss inclusions in colored gemstones and diamonds at an Evening Conversation for Van Cleef & Arpels.

A discussion about the importance of inclusions and photomicrography.

A look at the important sapphire producing localities in Madagascar, along with the key gemological features that can help separate them from other sapphire sources.

Myamar's Mogok Stone Tract is one of the most storied gem localities on the planet. Richard Hughes details the history and mystery of this magical valley.

An account of Burma's famous jade mines, based on three visits between 1996–2004.

Putting an end to the controversy over andesine from Tibet & Inner Mongolia.

A 2005 mission to ruby and sapphire localities in Madagascar, and a 2006 visit to the famous Russian Ural Mountain emerald and alexandrite deposits at Malysheva.

Discussion of a 2005 visit to sapphire localities in Madagascar.

Discussion of emerald enhancements, along with a 2005 mission to ruby and sapphire localities in Madagascar.

Discussion of emerald enhancements, along with a 2005 mission to ruby and sapphire localities in Madagascar.

Discussion of emerald enhancements, along with a 2005 mission to ruby and sapphire localities in Madagascar.