Carbonaceous chondrites or C chondrites represent some of the most pristine matter known, and their chemical compositions match the chemistry of the Sun more closely than any other class of chondrites. Carbonaceous chondrites are primitive and undifferentiated meteorites that formed in oxygen-rich regions of the early solar system so that most of the metal is not found in its free form but as silicates, oxides, or sulfides. Most of them contain water or minerals that have been altered in the presence of water, and some of them contain larger amounts of carbon as well as organic compounds. However, there are different clans and groups of carbonaceous chondrites that formed on different parent bodies in different regions of the early solar nebula. The most important groups are designated as CI, CM, CV, CO, CR, CK, and CH chondrites. This meteorite isn't classificate and your provenance is the Northwest African, Sahara. A certificate of authenticity included. About the seller: My name is Adrian Vilchez Luna. I'm co-founder of ExoEstrato: Andalusian Society of Astrogeology. We are dedicated to the dissemination, scientific education and research in Planetary Sciences and Astrogeology. We belong to the Faculty of Science of the University of Granada, Spain. I am geologist specializing in Geology Planetary, specifically, in minor bodies of the solar system (asteroids (NEA's) and meteorites) and on Mars.