Mount Ridley Mines Limited explores for mineral properties in Australia. The company explores for nickel, iron, copper sulphide, and gold deposits, as well as platinum-group elements and rare earth elements. It holds an interest in the Mount Ridley project located in Western Australia, and the Weld Range West project covering an area of 52 square kilometers located in Western Australia. The company was incorporated in 2000 and is based in Nedlands, Australia.