They are Primitive Acondritas. They are believed to come from F-type asteroids, which are asteroids of Carbonaceous origin and with abundant stratified glass, but they could also come from a single body generating this type of meteorite They contain a big amount of carbon, which is expressed in the form of graphite or micro-diamonds. Which denotes a scenario of high pressure and temperature Other studies say that ureilites are residues of unmelted material after being ejected from asteroids and are a mixture of carbonaceous chondrites and melted basaltic rocks In 2018, a study of micro-diamond inclusions concluded that they could only have formed over a relatively long period of time at high pressures, suggesting that ureilites’ matrix body was a planetary embryo within the distance that exist between Mercury and Mars Ureilites are one of the most fascinating and hard to find meteorites At Expometeoritos, we take care of the dissemination, talks, workshops, analysis, classification and exhibitions of Meteorites. We are members of: .- IMCA (International Meteorite Collectors Association) #8187 .- Meteoritical Society .- American Meteor Society All our pieces are certified and we also deliver the analysis of the chemical composition if the value of the piece exceeds €300, carried out in our facilities by X-ray Spectrography.