Gem Diamonds posts steep revenue fall as rough-diamond market weakens
Gem Diamonds reported a 36% year-over-year decline in revenue for 2025, with full-year sales of $98.4 million. The UK-based miner posted a net loss of $63.40 million and recorded an impairment at its Letšeng operation, while launching a cost and cash-conservation programme in the second half of the year.