The Science of Phenomenal Gems, a Summary of Pegmatites, and a Cutter’s Remarkable Journey
An overview of the Summer 2025 Gems & Gemology content.
Structures Behind the Spectacle: A Review of Optical Effects in Phenomenal Gemstones and Their Underlying Nanotextures
Provides a comprehensive summary of the special optical effects in gemstones, including opalescence, chatoyancy, asterism, schiller, and iridescence, and investigates the submicron inclusions and nanotextures in each type of phenomenal stone.
Gem Granitic Pegmatites
Describes the geology, mineralogy, and formation of granitic-composition pegmatites and provides a summary of their worldwide occurrences.
Ben Kho: From Rough Beginnings to Brilliant Mastery
Profiles the extraordinary life and work of Ben Kho, from a young entrepreneur in Cambodia to an award-winning gem cutter.
Emeralds and Beryl from Kazakhstan and Ukraine
A report from GIA’s Carlsbad laboratory on emerald and beryl samples studied as part of an ongoing beryl characterization research project.
GIA 檢驗世界第二大鑽石
In July 2025, staff from GIA, including GIA Executive Vice President and Chief Research and Laboratory Officer Tom Moses and Vice President of Research and Development Dr. Wuyi Wang, examined a rough diamond weighing 2,488.32 carats
GIA Examines the World’s Second Largest Diamond
In July 2025, staff from GIA, including GIA Executive Vice President and Chief Research and Laboratory Officer Tom Moses and Vice President of Research and Development Dr. Wuyi Wang, examined a rough diamond weighing 2,488.32 carats
GIA 於 10 月 1 日推出更新版的實驗室培育鑽石服務
GIA will launch revised evaluation services for D-to-Z laboratory-grown diamonds on October 1
GIA Launches Updated Laboratory-Grown Diamond Services October 1
GIA will launch revised evaluation services for D-to-Z laboratory-grown diamonds on October 1
GIA 任命 Sriram Natarajan 為全球鑑定所高級營運副總裁
Sriram 'Ram' Natarajan, previously managing director of GIA India Laboratory Private Limited (GIA India), has been appointed to a new role as senior vice president of laboratory operations.
GIA Names Sriram Natarajan Senior Vice President of Laboratory Operations
How-To Guide: Testing Diamonds and Gems using UV Light
GIA developed this guide so retailers can use fluorescence tests to help identify gems right in their own stores.
Two Exciting Panels Featured at AGS x GIA Converge
Industry leaders and some of GIA’s most experienced gemological experts will share their expertise and insights with participants at Converge.
Two Exciting Panels Featured at AGS x GIA Converge
Industry leaders and some of GIA’s most experienced gemological experts will share their expertise and insights with participants at Converge
GIA 宣布 Pritesh Patel 出任GIA主席兼行政總裁
The Board of Governors of GIA has named Pritesh Patel, currently GIA’s Chief Operating Officer, as the Institute’s President and Chief Executive Officer.
Pritesh Patel Named GIA President and Chief Executive Officer
The Board of Governors of GIA has named Pritesh Patel, currently GIA’s Chief Operating Officer, as the Institute’s President and Chief Executive Officer
GIA Evaluates Historic Diamonds in Christie’s Magnificent Jewels Auction
GIA has evaluated more than 30 rare and historically significant jewels ahead of Christie’s Magnificent Jewels auction, taking place on June 17 in New York.
Eighth Annual Gianmaria Buccellati Foundation Award Winner
A graduate of GIA’s Jewelry Design program in London is the recipient of the 2024 Gianmaria Buccellati Foundation Award.
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