Alrosa kicks off diamond exploration in Zimbabwe

Finding follows the recovery of five other diamonds of over 100 carats so far this year at the company's flagship Letšeng mine, in Lesotho.

New controls aims at holding the company's partners, including Glencore, China Molybdenum and Ivanhoe, accountable in copper and cobalt projects

Speculative frenzy not entirely supported by fundamentals.

The miner warned further reductions could be in store at those operations, which employ 31,000 people.

The Africa-focused diamond miner said that would likely happen unless it solves its issues with the government of Tanzania.

Draft bill gives government first option to buy unusually large diamonds found in the country's mines, such as the world's second-biggest 1,109 carat diamond discovered by Lucara two years ago.

Projects aim at boosting output and lowering costs.

The decision to offload the asset is part of a restructuring process that includes laying off about 8,500 workers, roughly 30% of the company’s workforce.

The South African mines ministry has told platinum miner Lonmin that it failed to meet some of its social and labour obligations, the producer said on Tuesday, but added it did not think its operating licence was in jeopardy.