Mining the Amazon brings low returns for local communities – study

Failure to reach a labor deal caused a 44-day strike at the mine last year.

Some 200 litres of cyanide solution were released into the environment.

The decision was made to reflect a challenging "shareholder experience" and operations at some mines.

The Nicaragua-focused miner has not generated any revenue in the past two years, but narrowed pre-tax loss to £3 million in 2017 from £7.7 million a year earlier.

Company is growing its Virginia facility, which will cover over 251,000 square feet once completed.

The 36-month contract was approved by 75 per cent of the union.

The share sale may be worth up to $2.4 billion if BNDESPar, the investment arm of state development bank BNDES, also sells part of its Vale stake.

While Nelson Pizarro could well stay on as Codelco's chief executive officer, the government is putting together a shortlist of candidates.

Early output of 1,720 carats of emeralds, including 826 carats of top quality ones, was achieved through a bulk-sampling program carried out within eight weeks of the completing the acquisition of the mine