Winonaite

a partially differentiated asteroid that was disrupted just as it began to form an Fe core and a silicate-rich crust. This disrupting impact mixed silicates into molten Ni-Fe metal forming the silicated IAB irons, and mixed olivine-rich residues of partial melts into unmelted silicates, forming the winonaites. A few winonaites have anomalous characteristics, however, suggesting that they may have a different origin.


Image source: http://tin.er.usgs.gov/meteor/get_original_photo.php?recno=5629996.