NWA 3133 is a rare and unusual meteorite from Northwest Africa, purchased in Morocco in 2004. It has been described as a CV7 meteorite and also discussed as a primitive or metamorphosed Achondrite with strong CV Carbonaceous affinity. This unusual classification reflects material that is chemically close to CV Carbonaceous Chondrites, but has been so strongly thermally altered that its original Chondritic texture has largely been recrystallised. The Meteoritical Bulletin records NWA 3133 as an approved Northwest African meteorite.

NWA 3133 specimens typically show a recrystallised, equigranular texture rather than the more familiar chondrule-rich appearance of typical CV3 Carbonaceous Chondrites. Reported mineralogy includes olivine, orthopyroxene, plagioclase, Cr-diopside, merrillite, metal, chromite, and troilite, with some metal and troilite altered to brown iron hydroxides. This highly metamorphosed texture makes it visually and scientifically distinct from more primitive CV meteorites such as Allende.

Studying NWA 3133 provides valuable insight into the effects of strong thermal metamorphism on Carbonaceous Chondrite-like material and the boundary between Chondrites and more altered meteorites. Its unusual CV affinity, rare classification history, and distinctive recrystallised structure make it especially interesting for collectors focused on Carbonaceous meteorites, Primitive Achondrites, or anomalous classifications. Each specimen represents ancient solar system material that has followed an uncommon path of heating and alteration.