Nickel recovered from a four-year low of $10,865 a tonne in March to a current $12,820.

More than 8 miles of underground development is now completed, 3 miles ahead of schedule.

Namdeb, a joint venture between the Namibian government and De Beers, produced 511,000 carats in the first quarter.

Company faces challenge with the jihadist movement in Burkina Faso and northern Mali.

Glencore said the workers were escorted to a local police station, but that all their work permits were valid.

Australia’s largest gold refinery has ramped up production in response to the supply crunch.

The Kobada project consists of one exploitation concession and two exploration concessions, totaling approximately 400 square km in the Sikasso region of southwestern Mali.

The fallout is difficult to quantify as countries extend, revise or relax measures to contain the crisis.