Tanzanian gemstone miner Tanzanite One has agreed to pay compensation and overdue taxes to the government after violations led to losses in public revenues.
European leaders sought unity on Wednesday toward threatened U.S. import tariffs on steel and aluminium, balancing the views of those most fearful of a trade war and those determined not to be bullied into concessions.
Zimbabwe has attracted intense interest from miners with a promise of favourable terms as it seeks to reboot its economy after veteran leader Robert Mugabe was ousted last year.
The global market for polished coloured diamonds is now dominated by Rio Tinto and Anglo American's De Beers. But state-controlled Alrosa aims to compete.
The London Bullion Market Association has suspended the Ekaterinburg Non-Ferrous Metals Processing Plant from its gold and silver good delivery lists due to "ownership related issues".
The group is seeking a total investment of $246 million for the refineries and related processing centres, in Ghana and the Democratic Republic of Congo.