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.
Read MoreAndrew Lucas, Armil Sammoon, A. P. Jayarajah, Tao Hsu, and Pedro Padua, October 31, 2014
Offers a firsthand look at Sri Lanka’s mining, cutting, jewelry manufacturing, and retail sectors, where tradition and innovation converge.
Read MoreWim 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.
Read MoreWim 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.
Read MoreTao Hsu, Andrew Lucas, Robert E. Kane, Shane McClure, and Nathan Renfro, August 7, 2017
Documents a visit to the upper Missouri River and Rock Creek sapphire mining areas.
Read MoreRobert Weldon, Jose Guillermo Ortiz, and Terri Ottaway, August 3, 2016
Chronicles the famed emerald source through the adventures of Peter W. Rainier, who directed the mine from 1926 to 1931 and restored its former glory.
Read MoreTao Hsu, Andrew Lucas, and Vincent Pardieu, February 1, 2016
Documents a trip to the renowned opal fields of Lightning Ridge, Koroit, Yowah, and Quilpie.
Read MoreMerilee Chapin, Vincent Pardieu, and Andrew Lucas, April 30, 2015
Explores the geology, production, and yield of the world’s most commercially important ruby deposit.
Read MoreGIA Staff, December 9, 2015
Join GIA’s recent field expedition to the ruby rush in Madagascar’s Zahamena National Park.
Read MoreGIA Staff, October 16, 2015
Go onsite to Zambia’s emerald mines with GIA’s field gemology team.
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