the quarterly journal of the gemological institute of america
In This Issue
Low-Temperature Heat Treatment of Pink Sapphires from Ilakaka, Madagascar
Baroque-Era Rose Cuts of Colored Stones: Highlights from the Second Half of the Seventeenth Century
Fluorescence Characteristics of Blue Amber from the Dominican Republic, Mexico, and Myanmar
Mineral Inclusions in Sapphire from Basaltic Terranes in Southern Vietnam: Indicator of Formation Model
Previous Issue
the quarterly journal of the gemological institute of america
Pink Sapphires from Madagascar, Rose-Cut Colored Stones from the Baroque Era, Separating Blue Amber Localities, and More…
Duncan Pay, Editor-in-Chief
Articles (4)
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.
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Baroque-Era Rose Cuts of Colored Stones: Highlights from the Second Half of the Seventeenth Century
Offers a systematic evaluation of rose cuts produced for various colored stones in the latter seventeenth century, based on the examination of rare artifacts that belonged to the archbishops and prince-electors of Trier and Cologne.
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Fluorescence Characteristics of Blue Amber from the Dominican Republic, Mexico, and Myanmar
Presents a combination of observational and spectroscopic means to separate the three main geographic localities for blue amber, which shows very strong blue fluorescence under sunlight or D65 illumination.
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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.
Read MoreRegular Features
Diamonds From the Deep
Explores the role of diamonds in our understanding of the natural world.
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Gem News International
Global coverage of gem sources, notable new gem materials, and recent industry developments.
View All (9)MOST VALUABLE ARTICLE AWARD
Geographic Origin Determination of Blue Sapphire
Aaron Palke, Sudarat Saeseaw, Nathan Renfro, Ziyin Sun, and Shane McClure
Decade of Ruby from Mozambique: A Review
Wim Vertriest and Sudarat Saeseaw
Gemstones in the Era of the Taj Mahal and the Mughals
Dona Mary Dirlam, Chris L. Rogers, and Robert Weldon
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