NWA 4925 (Shergottite) - Mars meteorite
The meteorite was found by an anonymous person in northwest Africa and bought by the main mass holder in Erfoud, Morocco. The meteorite displays a porphyritic texture with large chemically zoned olivine megacrysts set into a fine-grained groundmass composed of pyroxene and maskelynite. Minor phases include chromite, sulfides, phosphates, and small Fe-rich olivines. The olivine megacrysts often contain melt inclusions and small chromites.