South Africa’s National Union of Mineworkers (NUM) on last week said it was planning to strike at De Beers’ Venetia mine after wage talks broke down, potentially disrupting operations at the diamond giant’s new $2.3 billion underground facility. NUM, South Africa’s biggest mineworker union, said its members were demanding a 9% wage hike, but Anglo American Plc unit De Beers was offering a 6% increase. “The NUM can confirm that the four-month wage negotiations with