Fall 2023

GIA Store Verified independent store

→

Feature articles from this issue: Yellow Sapphire: Natural, Heat-Treated, Beryllium-Diffused, and Synthetic by John L. Emmett, Ungkhana Atikarnsakul, Jennifer Stone-Sundberg, and S upharart Sangsawong Special Colors and Optical Effects of Oregon Sunstone: Absorption, Scattering, Pleochroism, and Color Zoning by Shiyun Jin, Aaron C. Palke, Nathan D. Renfro, and Ziyin Sun Etch Pits in Heliodor and Green Beryl from the Volyn Pegmatites, Northwest Ukraine: A Diagnostic Feature by Gerhard Franz, Oleksii A. Vyshnevskyi, Volodymyr M. Khomenko, Peter Lyckberg, and Ulrich Gernert Iolite from the Thor-Odin Dome, British Columbia, Canada: Geology, Chemical Composition, Inclusions, and Cause of Chatoyancy by Philippe M. Belley GIA students and alumni save 10% on back issues! Enter coupon code GGALUM at checkout. Usually ships in 3-5 business days. SKU: 9302303 Show more