US EditionGIA Detects Permanent Color Change in Synthetic Sapphire
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GIA Detects Permanent Color Change in Synthetic Sapphire
The Gemological Institute of America (GIA) recently discovered that a synthetic blue sapphire can change its color permanently when exposed to ultraviolet light. A customer brought in a 1.70-carat, light blue gemstone to the GIA’s laboratory in New York, believing it was an alexandrite. The examination included standard gemological testing, which revealed the stone was a synthetic sapphire that reacted when exposed to ultraviolet light, accordi…
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