Barrick confirmed chairman John Thornton met President John Magufuli for talks Wednesday, but didn't mention the details of what, if anything, had been agreed.
Gemfields, which mines for emeralds and amethysts in Zambia and for rubies in Mozambique, had already received a buyout offer from largest shareholder Pallinghurst Resources.
Canada will need more pipelines built through to 2030 to transport an additional 1.3 million barrels per day of oil sands production to markets across North America and around the world, according to the Canadian Association of Petroleum Producers.
Sellers and buyers of responsibly sourced, exceptional polished diamonds will be able to transact anonymously via the De Beers Auction Sales platform for the first time this month, when the exceptional polished stones auction is held on 29 June.
Trump’s measures to revitalize the mining industry are steps on the right direction, and they will benefit not just the US, but also Canada, said Max Porterfield.
Chinese-owned Yancoal has signalled it may raise its bid for Rio Tinto's Hunter Valley coal assets, after striking the agreement with Mitsubishi to buy its stakes in the same mines.