Petra Diamonds said it could pay its first ever dividend earlier than expected, after higher prices for the larger number of rough stones it unearthed helped it post a 47% jump in full-year core earnings.
The miner has five producing mines in South Africa and one in Tanzania.
It said it was on track to mine about 3.2 million carats in the current fiscal year and expected to see higher prices for rough diamonds.
Prices for natural rough diamonds could rise by up to 10% this year as demand picks up, according to the Antwerp World Diamond Centre.
"We expect the rough diamond market to continue to strengthen in fiscal year 2015 due to constrained supply, robust US demand as well as further growth in demand from emerging markets such as China and India," Petra said.
The increasing appetite is due to improved credit conditions in India, the world's biggest diamond polishing market, and a rise in disposable incomes in the hands of China's burgeoning middle class.
Petra now expects growth in carat production to accelerate from fiscal year ending 2016 as this would be its last year of relying largely on stones mined from mature working areas.
Unlike other commodities, diamond miners cannot increase output at will as no new ore bodies have been found since the early 1990s, forcing companies to dig deeper in their ageing mines. Petra has a long-term goal of increasing production to 5 million carats by its 2019 financial year.
The company said that adjusted core earnings rose to $187.7m in the year to the end of June, from $127.6m a year earlier. Revenue grew by 20% to $471.8m.
Full-year production increased by 17% to 3.1 million carats in the full year, marginally ahead of market expectations of 3 million carats, Petra said.
The diamond miner said today it would consider bringing forward its dividend payment from financial year 2016.
