C Carbonaceous Chondrites are Carbonaceous meteorites that are recognised as primitive, carbon-rich material but remain ungrouped or only broadly classified within the wider Carbonaceous Chondrite family. Formed over 4.5 billion years ago, these meteorites preserve ancient solar system material rich in volatile elements, fine-grained matrix, and in some cases organic compounds and hydrated minerals. Unlike fully classified Carbonaceous groups such as CM or CV, ‘C’ classifications are typically assigned when available material is limited, altered, or displays unusual characteristics that do not fit established subgroups.

C Carbonaceous Chondrites are usually dark grey to black in appearance and may display fine-grained textures with variable visible chondrules depending on the specimen. Some show clear primitive features with minimal thermal alteration, while others preserve evidence of aqueous activity or brecciation on their parent bodies. Their composition can vary significantly, reflecting the broad and still evolving nature of Carbonaceous meteorite classification.

Studying C Carbonaceous Chondrites provides valuable insight into the diversity of primitive asteroid material and highlights the limits of current meteorite classification systems. Many specimens remain scientifically important because they may represent transitional, unusual, or previously unrecognised parent bodies. For collectors, C Carbonaceous Chondrites are highly desirable due to their rarity, primitive nature, and potential scientific significance. Each specimen represents ancient solar system material that may not fit neatly into existing categories.