The Castle-an-Dinas quarry, at Ludgvan, near Penzance, was formerly owned by Castle Granite Ltd, which went into administration in April. The council said the move secured 12 jobs and guaranteed supplies of granite for building and road works aggregates. It added that the move made financial sense, as its highways service alone bought about 100,000 tonnes of bitumin every year, costing about £4.5m.