Tertiary Minerals Plc is a holding company, which engages in the identification, acquisition, exploration, and development of mineral projects. The firm focuses on fluorspar, the main raw material source of fluorine for the chemical, steel, and aluminum industries. It operates through the Exploration Projects, and Head Office segments. The Head Office segment recognizes all other costs. The company was founded by Patrick Lyn Cheetham on August 3, 1999 and is headquartered in Macclesfield, the United Kingdom.