Gem Diamonds earned record profits in the six months to end-June as prices for the top class diamonds it produces from the Letseng and Ellendale mines went through the roof.
Rockwell Diamonds CEO James Campbell is on a mission to improve the company's technical ability for the recovery of diamonds, before embarking on major new expansion projects.
Diamond producer De Beers has signed a two-year wage deal with the National Union of Mineworkers, ending a 14-day strike.
The average value of the first diamonds recovered from the initial sampling work at Diamondcorp's Lace mine in the Free State is far higher than expected.
De Beers has recorded its highest interim sales figures to date, buoyed by strong retail demand from the Indian and Chinese consumer markets.
Letseng achieved record average prices for its diamond sales in the first half of 2011, as did Ellendale in Australia for its fancy yellow stones.
The National Union of Mineworkers' members at diamond producer De Beers Consolidated Mines has started a strike after wage talks failed, says a union official.
Rockwell Diamonds has scaled down its plans to raise C$35.3m in new funds, opting to aim for $20m instead.
Petra Diamonds has delivered a trading update backing CEO Johan Dippenaar’s claim the company is one of the world’s leading diamond producers.
Diamond prices are now above pre-crisis levels after a 35% to 40% rise so far this year, helped by increased scarcity and an emerging role as an investment.