The quarterly journal of the gemological institute of america
EDITORIAL
Low-Temperature Heating of Mogok Ruby, Copper-Diffused Feldspar, Porcelain-Treated Turquoise, and the Work of Gem Artist Chi Huynh
Duncan Pay, Editor-in-Chief
An overview of the Winter 2022 Gems & Gemology content.
Articles (4)
A Canary in the Ruby Mine: Low-Temperature Heat Treatment Experiments on Burmese Ruby
Documents heating experiments conducted on Burmese rubies to find useful indicators of heat treatment at temperatures below 1200°C.
Fluorescence Characteristics of Two Copper-Diffused Plagioclase Feldspars: Labradorite and Andesine
Examines the use of strong fluorescence near 394 nm under 320 nm excitation as a potential means of identifying copper diffusion treatment of feldspar.
Composition and Spectral Characteristics of Porcelain-Treated Turquoise
Characterizes turquoise treated with an inorganic additive that dramatically improves the luster and color of low- and medium-quality material.
Never Stop Innovating: Gem Artist Chi Huynh
Profiles a groundbreaking gem artist on a quest to bring new concepts, techniques, and products to the industry.
Regular Features
GEM NEWS INTERNATIONAL
Global coverage of gem sources, notable new gem materials, and recent industry developments.
COLORED STONES UNEARTHED
Explores the geological concepts related to colored stone formation.
THE DR. EDWARD J. GÜBELIN
Most Valuable Article Awards
Measurement and Characterization of the Effects of Blue Fluorescence on Diamond Appearance
Yun Luo, David Nelson, Troy Ardon, and Christopher M. Breeding
Internal Structures of Known Pinctada maxima Pearls: Natural Pearls from Wild Marine Mollusks
Artitaya Homkrajae, Areeya Manustrong, Nanthaporn Nilpetploy, Nicholas Sturman, Kwanreun Lawanwong, and Promlikit Kessrapong
Blue Sapphires from Mogok, Myanmar: A Gemological Review
Wasura Soonthorntantikul, Ungkhana Atikarnsakul, and Wim Vertriest
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