Mundrabilla is a riddle. When the metal was molten, the graphite and sulfide inclusions should have separated from it--like oil from water. Instead, they are thoroughly mixed, and no one is certain why.
Twenty-three tons (over 23,000 kg) of fragments rained down on a Siberian forest in 1947 when a meteorite shattered in mid-air. Even the largest pieces were too small to do more than gouge holes in the ground.