NWA 16415 - CO3 Carbonaceous Chondrite

NWA 16415 is a CO3 Carbonaceous Chondrite purchased in September 2023 after recovery from Northwest Africa. CO Chondrites are known for their small chondrules, primitive character, and relatively low levels of alteration compared with some other Carbonaceous groups. With a reported total known weight of 9.4 kg, NWA 16415 is a recognised and well-documented example of this uncommon Carbonaceous Chondrite group.

NWA 16415 specimens typically show a fine-grained dark brown matrix containing chondrules, chondrule fragments, and calcium-aluminium-rich inclusions, known as CAIs. Published descriptions note that the matrix makes up around 25 percent of the meteorite, with most chondrules belonging to chemical type I and commonly measuring between 50 and 300 micrometers. This fine texture and primitive composition give prepared fragments, slices, and study pieces strong scientific and collector interest.

Studying NWA 16415 provides valuable insight into early solar system materials, including the formation of small chondrules, CAIs, and fine Carbonaceous matrix. For collectors, it offers a scarce opportunity to acquire a recently classified CO3 Carbonaceous Chondrite with visible primitive features and a clear Northwest African provenance. Each specimen represents ancient asteroid material formed over 4.5 billion years ago, preserving evidence from the earliest stages of planetary formation.