NWA 13643 is a CM2 Carbonaceous Chondrite purchased in Morocco after recovery from Northwest Africa. CM Chondrites are among the most scientifically important Carbonaceous meteorites, known for their water-altered minerals, fine dark matrix, and organic-rich chemistry. As a CM2 meteorite, NWA 13643 represents primitive asteroid material that interacted with liquid water on its parent body early in solar system history. The Meteoritical Bulletin records NWA 13643 as an approved Northwest African meteorite.

NWA 13643 specimens are typically dark, fine-grained, and relatively fragile, consistent with CM2 Carbonaceous material. They may show small chondrules, pale mineral grains, and a subdued matrix that reflects aqueous alteration. Compared with more thermally altered Chondrites, CM2 meteorites preserve delicate chemical and mineralogical evidence of early water activity, making them especially valuable for understanding primitive asteroid evolution.

Studying NWA 13643 provides insight into water-rich parent bodies, hydrated minerals, and the early chemistry of the solar system. For collectors, it offers an accessible yet scientifically significant Carbonaceous Chondrite with a recognised classification and strong primitive character. Each specimen represents ancient asteroid material formed over 4.5 billion years ago, preserving evidence of water alteration and early planetary processes.