Tres Castillos — Complete Slice

Like all iron meteorites, the current offering is more than four billion years old and originates from the asteroid belt between Jupiter and Mars. Although Tres Castillos was originally classified as being a member of the IIIAB group of iron meteorites in the 77th edition of the Meteoritical Bulletin, its gallium/germanium ratio is much higher than that of other IIIAB group members. As such, it is now one of the special 147 ungrouped iron meteorites currently listed in the Meteoritical Bulletin Database.