The region's economy is based on the mining of Tanzanite gems on the Mererani Hills in north on the border with the Arusha Region.
Shortly thereafter, the stones were shown to John Saul, a Nairobi-based consulting geologist and gemstone wholesaler who was then mining aquamarine in the region around Mount Kenya.
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TanzaniteOne Mining Ltd is owned by Richland Resources Richland.
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Correct identification was also made by mineralogists at Harvard University, the British Museum, and Heidelberg University, but the very first person to get the identification right was Ian McCloud, a Tanzanian government geologist based in Dodoma.