Stone was recovered from the Neck zone of the Mothae kimberlite, not part of the current one-million carat Joint Ore Reserves Committee-compliant resource.
The testing is part of the definitive feasibility study (DFS) for the project, poised to become Nigeria's first large-scale gold mine, and which is expected to come online in early 2020.
Britain’s Serious Fraud Office plans to open a formal bribery investigation into Glencore and its deals with Israeli billionaire and former partner Dan Gertler.
Quellaveco is one of the world’s largest untapped copper orebodies and Anglo’s board is set to decide later in the year whether or not to green-light development of the $5.5bn mine.
The miner is receiving an upfront cash payment of $155 million for AuRico Metals’ royalty portfolio and about $45 million payable in four tranches for Kemess's silver output.