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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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Research
Summer 1984 G&G; Lab Notes
Arrow-Patterned Negative Crystals in Sapphire
Examination of a sapphire reveals negative crystals arrayed in an arrow-like pattern.
Sapphires from Southern Vietnam
Gem-quality blue to bluish green sapphires from basaltic terrains in southern provinces of Vietnam have been entering the gemstone market since the late 1980s.
Spring 2007 G&G; Lab Notes
This section, from the Spring 2007 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.
Spring 2008 Gem News International
Spring 2008 G&G; Lab Notes
This section, from the Spring 2008 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.
Abstracts; Summer 2009
This article, from the Summer 2009 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.
Abstracts; Fall 2009
This article, from the Fall 2009 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.
Heated Purplish Pink Sapphire from Ilakaka (Madagascar) with Colored Monazite Inclusions
Orange-brown monazite inclusions in a purplish pink sapphire are analyzed for evidence of heat treatment.
Sean Hill: Exquisite Jewelry Designs
Former university professor Sean Hill shares some of his unique jewelry designs at the GJX show.
Chromophore Behaviors (Including the 880 nm Absorption Band) in an Irradiated Pink Sapphire
A report showing the preliminary results of a radiation experiment with pink sapphire from Madagascar.
A Synthetic Moissanite Presented as Natural Diamond Rough
The New York laboratory identifies a sample submitted for a colored diamond identification and origin report as synthetic moissanite.
