London--De Beers’ parent company Anglo American PLC reported Wednesday that diamond production increased by 13 percent to 9.1 million carats in the fourth quarter while full-year production was up 12 percent to 31.2 million carats. 

At Debswana, the joint mining venture between De Beers and the government of Botswana, production in the fourth quarter ended Dec. 31 rose 17 percent to 6.4 million carats when compared with the third quarter 2013. 

Operation returned to the open-pit Orapa mine, which underwent unplanned maintenance in the third quarter and saw higher grades in the fourth quarter. The Jwaneng mine also saw increased production following slope failure in 2012.

The diamond miner and marketer’s Canadian operations showed increased production in the fourth quarter as well, largely due to improved throughput (more material being processed) and higher grades at the Snap Lake mine. De Beers Canada’s production rose 20 percent to 582,000 carats. 

Fourth quarter production at Namdeb, the joint venture between De Beers and the government of Namibia, rose 4 percent to 465,000 carats. 

Production for De Beers Consolidated Mines, which encompasses the company’s operations in South Africa, increased 28 percent to 1.7 million carats. 

For the full year, Debswana’s production increased 12 percent to 22.7 million carats; Namdeb rose 6 percent to 1.8 million carats; De Beers Consolidated Mines increased 7 percent to 4.7 million carats; and De Beers Canada increased the most, 26 percent, to 2.0 million carats. 

Anglo American’s full-year results will be announced on Feb. 14. 

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