the quarterly journal of the gemological institute of america
the quarterly journal of the gemological institute of america
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Texas Topaz, Slovak Opal, a Beryl Inclusions Chart, and More
Duncan Pay, Editor-in-Chief
An overview of the Winter 2023 Gems & Gemology content.
Articles (5)
![Gemology](https://www.gia.edu/images/WN23-Bassoo-Fig1-option3-314913-216px.jpg)
Topaz from Mason County, Texas
A comprehensive look at Texas topaz, detailing its gemological and compositional characteristics and providing a basis for using trace element concentrations to identify its origin.
Read More![History](https://www.gia.edu/images/WN23-Schmetzer-Fig1-314722-216px.jpg)
Bohemian Garnets as Decorative Materials for Glass Vessels from the Late Sixteenth to Early Eighteenth Centuries
Examines a technique for setting cut garnets on glass objects, invented by Claudius vom Creutz of Nuremberg in the late sixteenth century.
Read More![Gemology](https://www.gia.edu/images/WN23-Yan-Fig1-314969-216px.jpg)
A Unique Petrified Tree Fern from Northeast China
Documents the gemological properties, chemical composition, and appearance of petrified tree fern discovered in northeast China.
Read More![Mining](https://www.gia.edu/images/WN23-Semrad-Fig1-314737-216px.jpg)
Slovak Opal: A New Life for a Historical Gem
Reports on the recent production of precious and common opal from a centuries-old locality.
Read More![Inclusions](https://www.gia.edu/images/WN23-Renfro-Fig1-315044-216px.jpg)
Micro-Features of Beryl
Provides a visual guide to the internal features of different varieties of beryl.
Read MoreRegular Features
![Lab Notes](https://www.gia.edu/images/lab-notes-landing-page-300x169.jpg)
![Winter 2023 Micro-World Banner](https://www.gia.edu/images/WN23-MW-banner-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 (15)![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
![MVA First Place](https://www.gia.edu/images/SP23-MVA-1st-130x130.png)
Methods and Challenges of Establishing the Geographic Origin of Diamonds
Evan M. Smith, Karen V. Smit, and Steven B. Shirey
![MVA Third Place](https://www.gia.edu/images/SP23-MVA-3rd-130x130.png)
A Canary in the Ruby Mine: Low-Temperature Heat Treatment Experiments on Burmese Ruby
E. Billie Hughes and Wim Vertriest
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past gems & gemology issues
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