De Beers reported a rise in revenues and profits for the first six months of 2016.
The miner said this was due to higher demand for rough goods, together with bringing costs under stricter control and exchange rates that worked in its favor.
Anglo American, which owns 85 percent of De Beers, reported that revenue jumped 8.2 percent to $3.27 billion in the first half of this year.
Sales of rough stones surged by 11 percent to $3.1 billion, helping to offset a fall of 14 percent in average realized prices per carat of $177.
In other parts of its overall business, De Beers' revenues from its Element Six industrial diamond division dropped.
Meanwhile, the number of outlets worldwide selling its Forevermark branded diamonds jumped by 6.5 percent in H1 to 1,874 stores.
The miner reported that rough demand increased due to manufacturers and dealers rebuilding stocks that fell in the second half of 2015.
Furthermore, retailers carried out a degree of restocking after solid 2015 holiday season sales.
Looking ahead, De Beers stressed that rough sales typically slow down in the second half of the year. In addition, global markets face many challenges, which include social and political instability.
“Caution in rough diamond buying is expected to prevail, as the supplies bought by diamantaires in the first half are gradually converted into polished,” the company said in a statement.
Rough production in the first half of this year dropped by 15 percent to 13.3 million carats, after the company decided to slash production as a result of soft market conditions at the end of last year.
