Country is planning to raise surveillance of copper and aluminum imports while developing policies to curb shipments from China and other Asian nations to protect domestic producers, said two government sources and an industry official.

The gem was cut from a 271-carat rough that was discovered at the Victor mine in Ontario.

The world's second-largest gold producer lost a key court challenge last week over rights to the Porgera mine.

The privately-held group is seeking acquisitions that include green energy in order to meet its goal of becoming carbon neutral by 2030.

The U.S regulator has not yet decided to launch an investigation.

Fitch predicts miners will explore options to shorten and simplify supply chains.