the quarterly journal of the gemological institute of america
the quarterly journal of the gemological institute of america
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Burmese Blue Sapphire and Peridot from Mogok and a History of Emerald Mining in Habachtal, Austria
Duncan Pay, Editor-in-Chief
An overview of the Winter 2021 Gems & Gemology content.
Articles (3)
![Localities](https://www.gia.edu/images/WN21-Sripoonjan-fig1AB-272125-216px.jpg)
Gemological Characterization of Peridot from Pyaung-Gaung in Mogok, Myanmar
Examines the mining and the internal, spectroscopic, and chemical features of peridot from this deposit, which possesses a rich olive green color and is available in large sizes.
Read More![Localities](https://www.gia.edu/images/WN21-Vertriest-Fig4-272078-216px.jpg)
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.
Read More![History](https://www.gia.edu/images/WN21-Schmetzer-Fig1ABC-272251-216px.jpg)
History of Emerald Mining in the Habachtal Deposit of Austria, Part I
Contributes to the mining history of Austria’s Habachtal region, which is believed to be one of the earliest emerald deposits.
Read MoreRegular Features
![Lab Notes](https://www.gia.edu/images/lab-notes-landing-page-300x169.jpg)
![Winter 2021 Micro-World Banner](https://www.gia.edu/images/WN21-MW-Banner-272041-300x169.jpg)
![Gem News](https://www.gia.edu/images/gni-landing-page-300x169.jpg)
Gem News International
Global coverage of gem sources, notable new gem materials, and recent industry developments.
View All (8)![Colored Stones Unearthed](https://www.gia.edu/images/colored-stones-unearthed-landing-page-300x169.jpg)
Colored Stones Unearthed
Explores the geological concepts related to colored stone formation.
View All (1)Most Valuable Article Awards
A Quantitative Description of the Causes of Color in Corundum
Emily V. Dubinsky, Jennifer Stone-Sundberg, and John L. Emmett
History of the Chivor Emerald Mine, Part I (1880–1925): From Rediscovery to Early Production
Karl Schmetzer, Gérard Martayan, and Jose Guillermo Ortiz
Naturally Colored Yellow and Orange Gem Diamonds: The Nitrogen Factor
Christopher M. Breeding, Sally Eaton-Magaña, and James E. Shigley
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