Two of them are foreign firms.

Chief Executive Elon Musk said firm is on track to produce 20,000 per month by December.

U.S. Mint American Eagle gold coin sales in the first half of 2017 were the lowest for this period in a decade, while sales of silver in the period were the weakest since 2008, government data showed on Friday.

U.S. President Donald Trump's plan to restrict imports of steel and aluminium for national security reasons came under fire at the World Trade Organization on Friday, with China, the European Union, Brazil, Australia, Taiwan and Russia raising concerns.

The Tanzanian government submitted three bills to parliament on Thursday that would allow it to force mining and energy companies to renegotiate their contracts.

Moratorium aims to restrict illegal mining activity on private land and companies that ignore mining guidelines, resulting in environmental pollution.

Jandaga Mines is taking advantage of investors' concerns over buying into South African platinum businesses.

The funds from Beijing would contribute towards building 1,400 km of a planned 4,000 km railway network, which would connect bauxite mines and production sites.

Mining companies operating in Chile are examining restarting projects that were put on hold in recent years due to a copper price slump, the mining minister and industry executives said, though final investment decisions will wait until political uncertainty lifts after the November presidential elections.

The firm, a joint venture between De Beers and the southern Africa country's government, plans to extend the lifespan of its Jwaneng mine beyond 2024.

Shareholders of Brazil's Vale SA approved a share conversion plan on Tuesday in a move that should boost transparency, give equal votes to all shares and limit government meddling in the world's No. 1 iron ore producer.

Russia's mining giant Norilsk Nickel (Nornickel) said on Tuesday it was in talks with German chemicals firm BASF to supply raw materials needed in the process for making lithium-ion batteries in Europe in the future.