The Keevil family’s control of Teck through voting shares has long insulated the company from takeovers.

Agnico Eagle, through a Mexican subsidiary, will take a 50% stake in Minas de San Nicolás for $580 million.

The Stolberg plant largely supplies European battery producers with lead.

Amazon and De Beers are betting that custom-made gems could could help revolutionize computer networks. 

The Imbabura provincial court said a 2014 environmental license and other permissions given for the Llurimagua project do not comply with proper parameters.

Freeport is keeping an eye out for deals but is focused on its own projects, Adkerson said.