Turnstone Resources Ltd engages in the development of potash mining projects in Germany. The company primarily explores potash deposits. Its flagship project Ohmgebirge north-western extent of the South Harz sedimentary basin approximately 30km west of Sondershausen and 65km northwest of the state capital, Erfurt in Germany. The company was formerly known as South Harz Potash Limited and changed its name to Turnstone Resources Ltd in March 2026. Turnstone Resources Ltd is headquartered in West Perth, Australia.