NWA 15856 is a Polymict Eucrite found near Ouargla, Algeria, in 2020 and officially classified as an HED Achondrite. As a Eucrite, it belongs to the meteorite family strongly linked to asteroid 4 Vesta, representing basaltic crustal material from an early differentiated body. The Meteoritical Bulletin records NWA 15856 as a single 530 g stone, making it a limited and well-documented example of Vestan material.

NWA 15856 specimens show a brecciated texture, with angular to sub-rounded cumulate and basaltic Eucrite clasts set within a fine-grained fragmental matrix. Minor Diogenite clasts are also present, making up less than 10 percent by volume, along with accessory phases including silica-rich glass, troilite, and iron-nickel metal. The original stone is described as having heavily weathered fusion crust over around 60 percent of its surface, with desert varnish covering the remainder.

Studying NWA 15856 provides valuable insight into volcanic crust formation, impact mixing, and geological evolution on asteroid 4 Vesta. Its Polymict Eucrite classification records the mixing of different Vestan lithologies, while its single-stone recovery and limited total mass add to its collector appeal. Each specimen represents ancient basaltic material from Vesta, shaped by volcanic activity, impact processing, and eventual delivery to Earth.