Tanzania, March 11 -- Dar es Salaam. The government has explained the sharp decline in Tanzania's diamond production during the final quarter of 2025, attributing the drop mainly to seasonal disruptions and operational adjustments in key mining areas.

Officials say the downturn was temporary and largely linked to heavy rains, safety upgrades and production cycle changes at the country's main diamond mine.

Data from the Bank of Tanzania (BoT) show that diamond output fell to 43,244 carats valued at $6.1 million in the quarter ending December 2025. This was a steep fall from 111,125.8 carats worth $17.4 million recorded in the preceding quarter.

The figures indicate a 61 percent decline in production volume and a 65 percent drop in value...