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Sapphire
The name “sapphire” can also apply to any corundum that’s not ruby red, another corundum variety.
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Winter 2010 Gem News International
Winter 2012 Gem News International
A Preliminary Study on the Separation of Natural and Synthetic Emeralds Using Vibrational Spectroscopy
Reports preliminary findings—based on FTIR and Raman spectrometry of more than 300 samples—on distinguishing natural and synthetic emeralds using vibrational spectroscopy.
Diagnostic Features and Heat Treatment of Kashmir Sapphires
Today, only by combining different gemological tests with years of practical experience, can a conclusive determination of the origin of a sapphire be made.
Sapphire Rush Near Ambatondrazaka, Madagascar
A newly found deposit of sapphire in Madagascar is explored.
Chart: Inclusions in Natural, Synthetic, and Treated Sapphire
Provides a visual guide to the internal features of natural, synthetic, and treated sapphires.
Update on Montana’s Rock Creek Sapphire
Low-Temperature Heat Treatment of Pink Sapphires from Ilakaka, Madagascar
Studies the effects of low-temperature heat treatment on inclusions in this gem material, as well as the use of FTIR spectroscopy to detect the treatment.
The Effects of Heat Treatment on Zircon Inclusions in Madagascar Sapphires
Zircon inclusions in sapphires from Madagascar were studied to investigate the effects of heat treatment on their gemological and spectroscopic features.
34th International Gemmological Conference
A report from the 34th IGC, held in Vilnius, Lithuania in August 2015.
Zigzag Fingerprint in Sri Lankan Sapphire
Fiber-optic illumination reveals rectilinear zigzag-patterned films with vibrant colors in a blue sapphire.
