Stony-iron meteorites are mixtures of nickel-iron and silicate minerals and originate from the thin zone of melted rock that lies between an asteroid's mantle and core. These meteorites contain the silicate mineral olivine trapped in the iron. Included in this classification are pallasites and mesosiderites. Stony-iron meteorites represent less thand 1% of meteorites that fall to Earth.
Pallasites contain an equal amount of olivine and nickel iron by volume and are amound the rarest and most beautiful meteorites.
Mesosiderites are composed of angular rock fragments of different mineral compositions.