Anglo American PLC (AAL.LN) reported Tuesday mixed production figures across its divisions, with a sharp rise in diamond output and declines in nickel and iron ore, while it also lowered full-year guidance for platinum. The globally diversified miner said its output increased 6% on a copper-equivalent basis for the three months ended Sept. 30. This compares with an 8% year-on-year increase in copper-equivalent production for the second quarter of this year and a 4% rise in the same metric for the third quarter of 2016. Anglo American's production of diamonds grew 46% to 9.2 million carats. The company said that stable trading conditions supported increased output at its De Beers diamond unit, driven by the Debswana joint venture--owned by De Beers and the government of Botswana--and a ramp-up at its Gahcho Kue mine in Canada. Iron-ore production stood at 15.7 million tons, down 4% on year.