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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 MoreThis section, from the Winter 2011 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
Read MoreGem-quality zircon from a relatively underdeveloped locality in the Harts Range of central Australia is described.
Read MoreThe Elahera gem field currently provides approximately 35% of the gemstones exported from Sri Lanka.
Read MoreAn overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.
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