FEATURED ARTICLE

Update on Colored Gemstone Mining in Tanzania

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by Vincent Pardieu and Wim Vertriest

A team of GIA field gemologists visited Tanzanian mines in the summer of 2016 to collect ruby and sapphire for GIA’s reference collection and explore new sources of colored stones. The field expedition, led by these authors, visited many known Tanzanian gem localities as well as new deposits…

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Article on GIA.EDU

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