Mundrabilla - Iron, IAB-ung

Mundrabilla is a major Iron meteorite from the Nullarbor Plain of Western Australia, officially classified within the IAB complex, often listed as Iron, IAB-ung. Early small fragments were found in the wider Premier Downs and Loongana Station area from 1911 onward, while two very large masses were discovered near Mundrabilla in 1966. With a total known weight often cited at around 22 tonnes, Mundrabilla is one of Australia’s largest and most important Iron meteorites.

Mundrabilla specimens are composed mainly of iron-nickel metal and can show Octahedrite structure when cut, polished, and etched. The meteorite is especially known for abundant troilite, along with inclusions such as schreibersite, graphite, and silicate minerals. Natural pieces may show weathered exterior surfaces, metallic character, and cavities or irregular textures linked to sulfide-rich areas and long terrestrial exposure on the Nullarbor Plain.

Studying Mundrabilla provides insight into the IAB Iron meteorite complex, metal-sulfide segregation, impact processing, and the formation of large metallic meteorite showers. Its Australian provenance, huge recovered masses, unusual inclusion-rich structure, and recognised classification make it especially desirable for collectors of Iron meteorites and classic named finds. Each specimen represents ancient asteroid material preserved in metallic form for over 4.5 billion years.