The U.S. has responded to concerns that China might restrict the export of minerals by trying to diversify its supply chain. That included support for the recent re-opening of a long-closed tungsten ...

London-listed Gemfields, whose ambassador is actress Mila Kunis, has been blindsided by the imposition of a double-digit tax ...

Gemfields will lobby the Zambian government reverse a newly reinstated export duty on precious stones, as its share price stumbles on fears for its Kagem ...