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ZIRCON
Zircon is a colorful gem with high refraction and fire that’s unfairly confused with cubic zirconia.
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Research
A Zircon with Strong Photochromic Effect
Photochromic zircon shows significant color change from medium light greenish blue to very dark yellowish green.
Gemstone Guidebook Project
A project coordinated by GIA and the NGO Pact provides a valuable educational tool to women miners in Tanzania.
Vibrantly Colored Gems
Bill Larson of Pala International reports a very strong AGTA Tucson show.
Rex Guo: The Science and Art of Recutting Fine Gemstones
Rex Guo describes how he sources and systematically recuts faceted stones to unlock their inner beauty.
Reversible Color Modification of Blue Zircon by Long-Wave Ultraviolet Radiation
Determines whether blue zircon, inadvertently altered to brown by exposure to long-wave UV radiation, can be restored to its original color through the use of incandescent light.
The Fluid Art of Angela Conty
Angela Conty exhibits and discusses her work at the 2016 Tucson gem shows.
Chemical Analysis of Zircon
Trace-element analysis is used to identify metamictization, treatment, and growth conditions of zircon.
Tenebrescent Zircon
Color modification is observed in a reddish orange zircon at the Bangkok laboratory.
Update on Ametrine from the Yuruty Mine, Bolivia
A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.
Spring 2000 Gem News International
A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.
Zircon from the Harts Range, Northern Territory, Australia
Gem-quality zircon from a relatively underdeveloped locality in the Harts Range of central Australia is described.
The Elahera Gem Field in Central Sri Lanka
The Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.
