East African Mining News Unearthing Mining Opportunities in East Africa
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Deep in Tanzania’s Ruvuma Region, the Tunduru District quietly holds one of East Africa’s most extraordinary concentrations of gemstones and precious minerals, yet it remains largely off the radar of the global mining mainstream.
The district’s alluvial deposits yield an unusually diverse array of high-value stones: vividly coloured sapphires and rubies sit alongside rarer finds such as alexandrite, chrysoberyl, spinels, zircon and a spectrum of garnet varieties including rhodolite and spessartite. Few regions on the continent can match that breadth in a single locale.
Tunduru’s riches extend beyond gemstones. Gold is recovered from gravels along the Muhuwesi River, whilst the wider Ruvuma Region harbours strategic industrial minerals such as coal, uranium and graphite among them, that could prove significant as global demand for energy transition materials intensifies.
The district’s defining characteristic is its small-scale, artisanal character. Gravel-deposit mining has long dominated activity, with a particularly frenetic boom in the mid-1990s drawing thousands of prospectors and dealers from across the region. That rush has since cooled but Tunduru’s position straddling the Mozambique border keeps it embedded in the broader southern African gemstone trade.
Its relative obscurity may, in fact, be its most compelling attribute. As larger, better-known deposits face growing pressure from regulatory scrutiny and competition, Tunduru stands as a reminder that Tanzania’s mineral wealth is far from fully mapped.
