The London-listed and South Africa-active Petra is taking steps to sell its entire shareholding in the Tanzanian entity to Pink Diamonds Investments for a headline consideration of up to $16-million.

The diversified miner posted a worse loss than expected as it booked billions of dollars worth of net impairments.

Anglo American wrote down the value of its embattled De Beers diamond business by another $2.9 billion as it seeks to ready the division for disposal as part of the miner's efforts to simplify its ...