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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Reviews the mining history, market impact, and properties of ruby from northern Mozambique near Montepuez, now the world’s most productive source.
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Recounts an expedition to Mozambique’s important deposits of ruby, spinel, and tourmaline, which have yet to be fully explored.
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Explores the geology, production, and yield of the world’s most commercially important ruby deposit.
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Join GIA’s recent field expedition to the ruby rush in Madagascar’s Zahamena National Park.
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See inside the world’s most productive ruby mining operation with GIA’s field gemology team.
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Visit gem mining areas in Madagascar, Kenya, Tanzania, Zambia and Mozambique with GIA’s field gemologists.
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