Nathan D. Renfro, November 7, 2016
Determines whether blue zircon, inadvertently altered to brown by exposure to long-wave UV radiation, can be restored to its original colour through the use of incandescent light.
Read More, December 1, 2011
This section, from the Winter 2011 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Read MoreMaxwell J. Faulkner and James E. Shigley, December 1, 1989
Gem-quality zircon from a relatively underdeveloped locality in the Harts Range of central Australia is described.
Read MoreMahinda Gunawardene and Mahinda S. Rupasinghe, June 1, 1986
The Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.
Read MorePeter C. Zwaan, June 1, 1982
An overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.
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