Mir mine in Yakutia: largest open pit diamond mine in world

The gold miner reported earnings of $236 million in the quarter to Sept. 30, compared to a loss of $194 million the same period last year.

Bullion prices have surged about 33% this year, on track for the largest annual gain since 1979.

"The demand for high grade ore continues to be strong," chief commercial officer Bold Baatar said.

Battery swapping allows an electric vehicle to quickly exchange a discharged battery pack for a fully charged one, instead of recharging the vehicle at a static charging station.