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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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Blue Sapphire Lord of the Rings Pendant
After 15 years in the making, Jeffrey Bilgore’s stunning blue sapphire pendant makes its debut at the AGTA show.
Fifth Annual Gianmaria Buccellati Foundation Award Winner
Meghan Simmons, a graduate of GIA’s Jewelry Design program at the Carlsbad campus, received the fifth annual Gianmaria Buccellati Foundation Award for Excellence in Jewelry Design.
Blue Sapphires from Mogok, Myanmar: A Gemological Review
A gemological analysis of blue Burmese sapphires from Mogok, based on a series of field expeditions over the last decade.
Sapphires from Anakie, Australia: A Closer Look at Blue, Yellow, Green and Bicolor Sapphires
Though long underappreciated, Australian sapphires could see a resurgence with the arrival of Fura Gems, a major mining and marketing company.
Sapphires from Anakie, Australia: A Closer Look at Blue, Yellow, Green and Bicolor Sapphires
Though long underappreciated, Australian sapphires could see a resurgence with the arrival of Fura Gems, a major mining and marketing company.
Mineral Inclusions in Sapphire from Basaltic Terranes in Southern Vietnam: Indicator of Formation Model
Proposes a formation model for sapphire from the main deposits in southern Vietnam based on the chemical composition of their mineral inclusions.
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.
A quantitative description of the causes of color in corundum
Dubinsky E.V., Stone-Sundberg J., Emmett J.L. (2020) A quantitative description of the causes of color in corundum. Gems & Gemology, Vol. 56, No. 1, pp. 2-28.
A Quantitative Description of the Causes of Color in Corundum
Presents a quantitative means of determining the causes of color in a gem material, using corundum’s six major chromophores as an illustration.
The Geographic Origin Dilemma
An overview of the geographic origin complexities facing the gem and jewelry industry today.
Geographic Origin Determination of Blue Sapphire
In some cases, the value of a sapphire depends strongly on its geographic origin. This article details the origin data GIA has collected for blue sapphire and describes its methodology for using the data in geographic origin determination.
A Review of Analytical Methods Used in Geographic Origin Determination of Gemstones
Geographic origin determination relies on a combination of gemological observations and advanced analytical tools. This contribution reviews the analytical methods commonly used to establish origin.
