Mount Egerton is a rare anomalous Aubrite meteorite from Western Australia, found in 1941 near Mount Egerton. Aubrites are Enstatite Achondrites, formed under highly reduced, oxygen-poor conditions on an early differentiated parent body. Mount Egerton is especially unusual because it combines Aubrite-like silicate material with notable iron-nickel metal, placing it among the more distinctive and scientifically interesting Enstatite-rich meteorites. The Meteoritical Bulletin records Mount Egerton as an approved Australian meteorite from Western Australia.

Mount Egerton specimens can show pale to grey Enstatite-rich material mixed with metallic iron-nickel. Some descriptions note large intergrown Enstatite crystals together with nuggets of Fe-Ni metal, along with phases such as schreibersite and troilite. This unusual mixture gives prepared pieces a strong contrast between light silicate minerals and darker or reflective metal areas. Its anomalous Aubrite classification reflects both its close relationship to Aubrites and its differences from more typical examples.

Studying Mount Egerton provides valuable insight into highly reduced formation environments and the diversity of Enstatite-rich Achondrites. Its unusual mineralogy helps researchers compare Aubrites with related anomalous meteorites and Enstatite Chondrite material. For collectors, Mount Egerton offers a scarce and distinctive Australian meteorite with a long-established classification history and strong scientific interest. Each specimen represents ancient material formed under rare conditions in the early solar system.