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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.

Variety of rubies from northern Mozambique, 2009–2010

A Decade of Ruby from Mozambique: A Review

Wim Vertriest and Sudarat Saeseaw, August 15, 2019

Reviews the mining history, market impact, and properties of ruby from northern Mozambique near Montepuez, now the world’s most productive source.

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.

Mozambique: A Ruby Discovery for the 21st Century

Merilee Chapin, Vincent Pardieu, and Andrew Lucas, April 30, 2015

Explores the geology, production, and yield of the world’s most commercially important ruby deposit.

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