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Field gemologists sort through gem gravel in Myanmar

Field Gemology: Building a Research Collection and Understanding the Development of Gem Deposits

Wim Vertriest, Aaron C. Palke, and Nathan D. Renfro, January 31, 2020

With more than 90 field expeditions on six continents since 2008, GIA has accumulated over 22,000 colored stone reference samples. This extensive collection of colored stones with known origins supports GIA’s research on geographic origin determination.

Land of Origins: A Gemological Expedition to Ethiopia

Wim Vertriest, Daniel Girma, Patcharee Wongrawang, Ungkhana Atikarnsakul, and Kevin Schumacher, May 15, 2019

Documents a visit to the sapphire, opal, and emerald mining and trading areas of Ethiopia.

Splendor in the Outback: A Visit to Australia’s Opal Fields

Tao Hsu, Andrew Lucas, and Vincent Pardieu, February 1, 2016

Documents a trip to the renowned opal fields of Lightning Ridge, Koroit, Yowah, and Quilpie.

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