Prices for nickel, used in stainless steel and batteries, dropped towards $15,000 a ton on the London Metal Exchange.
The diamond giant has faced multiple headwinds in recent years.
Timothy Foden, co-head of the arbitration group at Boies Schiller Flexner, looks at legal challenges facing the mining industry.
Mining executives argued for a sharper industry focus on economic solvency, environmental accountability and public perception at a London event this month.
