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.
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Offers a firsthand look at Sri Lanka’s mining, cutting, jewelry manufacturing, and retail sectors, where tradition and innovation converge.
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Documents a visit to the sapphire, opal, and emerald mining and trading areas of Ethiopia.
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Documents a visit to the upper Missouri River and Rock Creek sapphire mining areas.
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Tour one of the world’s most active sapphire mining areas—the island of Madagascar—with GIA’s field gemologist Vincent Pardieu.
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Visit gem mining areas in Madagascar, Kenya, Tanzania, Zambia and Mozambique with GIA’s field gemologists.
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