the quarterly journal of the gemological institute of america
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the quarterly journal of the gemological institute of america
Gems & Gemology at Ninety: A Look to the Future
Tom Moses
An overview of the Fall 2024 Gems & Gemology content.
Articles (4)
Observations of Oval-, Pear-, and Marquise-Shaped Diamonds: Implications for Fancy Cut Grading
Presents findings from observations of oval-, pear-, and marquise-shaped diamonds, laying the groundwork for a fancy cut grading system.
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Classification of Gem Materials Using Machine Learning
Explores the application of several machine learning models to complement traditional gem classification approaches.
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Generative Artificial Intelligence as a Tool for Jewelry Design
Evaluates the use of generative AI programs in jewelry design and addresses the related ethical, legal, and regulatory challenges.
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Amethyst from Newfoundland, Canada: Geology, Internal Features, and Fluid Inclusion Microthermometry
Characterizes gem-quality amethyst from the La Manche deposit in the Avalon Zone of Newfoundland, Canada.
Read MoreRegular Features
Gem News International
Global coverage of gem sources, notable new gem materials, and recent industry developments.
View All (15)
Special Features
In the Spotlight
An in-depth look at jewelry recently recovered from a 1715 Spanish shipwreck.
Gallery
Scenes from 90 Years of Gems & Gemology
Most Valuable Article Awards
Yellow Sapphire: Natural, Heat-Treated, Beryllium-Diffused, and Synthetic
John L. Emmett, Ungkhana Atikarnsakul, Jennifer Stone-Sundberg, and Supharart Sangsawong
Gemological Characterization of Montana Sapphire from the Secondary Deposits at Rock Creek, Missouri River, and Dry Cottonwood Creek
Aaron C. Palke, Nathan D. Renfro, Jeffrey R. Hapeman, and Richard B. Berg
Color Modification of Spinel by Nickel Diffusion: A New Treatment
Michael Jollands, Abadie Ludlam, Aaron C. Palke, Wim Vertriest, Shiyun Jin, Pamela Cevallos, Sarah Arden, Elina Myagkaya, Ulrika D’Haenens-Johannson, Vararut Weeramongkhonlert, and Ziyin Sun
Special Colors and Optical Effects of Oregon Sunstone: Absorption, Scattering, Pleochroism, and Color Zoning
Shiyun Jin, Aaron C. Palke, Nathan D. Renfro, and Ziyin Sun
the archive
past gems & gemology issues
Winter 2024
Volume 60, Issue 4
Fall 2024
Volume 60, Issue 3
Summer 2024
Volume 60, Issue 2
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Volume 60, Issue 1
Winter 2023
Volume 59, Issue 4
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Volume 4, Number 12
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Winter 1935
(November-December)
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Winter 1934
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Spring 1934
(March-April)
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Winter 1934
(January)
Volume 1, Issue 1
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