Meteorites are stones that originate in outer space from particles of comets, the asteroid belt, and planets and have survived the fall through Earths atmosphere. The composition and color range of the meteorite is varied. There are three classes of the meteorite: the irons, chondrites, and achondrites. The irons are comprised of mainly iron and nickel; the chondrites are comprised of stone, and the achondrites are comprised of very rare stony irons consisting of stone fragments and/or beautiful olivine crystals embedded in a nickel-iron matrix.