"Combination of sanctions against Russia, decisions from a number of U.S.-based jewellery businesses to apply their own restrictions on purchases of Russian diamonds ... has the potential to underpin continued robust demand for De Beers' rough diamonds," the miner said. Anglo American said it expects rough diamonds' full-year production to be at 32 million-34 million carats, up from a prior range of 30 million to 33 million carats. The London-listed miner, however, reported a 9% fall in second-quarter output on lower grades in copper and lack of water availability in Chile, ramp-up of the Aquila longwall in steelmaking coal as well as planned maintenance at the Minas-Rio iron ore mine in Brazil.