New Frontier Minerals Limited engages in the exploration and examination of mineral properties primarily in Australia and Zambia. It primarily explores for copper, cobalt, silver, gold, lead, niobium, uranium, and zinc deposits, as well as rare earth elements. The company holds interest in Harts Range project located in north-east from Alice Springs and NWQ Copper Project located in north of Mt Isa in Queensland. It also holds option to acquire 90% of Pomme REE Project, consists of 43 mineral claims, covering approximately nine square miles located in northwest of Montreal in Quebec. The company was formerly known as Castillo Copper Limited and changed its name to New Frontier Minerals Limited in December 2024. New Frontier Minerals Limited was incorporated in 2009 and is based in Subiaco, Australia.