Caledonia Mining Corporation Plc ( LON:CMCL ) (TSE:CAL) has produced a record 16,876 ounces of gold during the quarter ended 31 December 2019. In a statement, Caledonia's chief executive Steve Curtis said that an improvement in the electricity supply and a rigid focus on grade control had helped boost production at the Blanket gold mine in Zimbabwe by 24% over the previous quarter, and by 13% compared to the corresponding quarter in 2018.