NWA 15857- Enstatite Achondrite (Aubrite)

NWA 15857 is a rare Aubrite, also known as an Enstatite Achondrite, purchased in July 2021 after recovery from Northwest Africa. Aubrites formed under highly reduced, oxygen-poor conditions on an early differentiated parent body, giving them a mineralogy that differs strongly from most other Stony meteorites. NWA 15857 is officially classified as an Enstatite Achondrite, placing it within this uncommon and scientifically important group.

NWA 15857 specimens are composed largely of Enstatite-rich material and typically show the pale, light-coloured character associated with Aubrites. Like other Aubrites, it lacks chondrules and instead reflects igneous processing within a differentiated body. Prepared pieces may show a fine to granular texture, with subtle mineral variation and occasional opaque phases, giving the material a distinct appearance compared with darker Achondrites and Chondrites.

Studying NWA 15857 provides valuable insight into highly reduced formation environments and the diversity of early differentiated parent bodies. For collectors, it offers a scarce Northwest African Aubrite with recognised classification and strong scientific appeal. Each specimen represents ancient igneous material formed under unusual chemical conditions in the early solar system.