Rex Minerals Limited engages in the exploration, evaluation, and development of mineral properties in Australia. The company explores for copper, gold, and iron oxide deposits. Its flagship project is the 100% owned Hillside project located in Yorke Peninsula, South Australia. Rex Minerals Limited was incorporated in 2007 and is based in Pine Point, Australia. As of October 30, 2024, Rex Minerals Limited operates as a subsidiary of MACH Metals Australia Pty Ltd.