re: It Came, it was Seen, it was Captured...
ureilites...since I had no idea what that meant I looked it up.
A rare class of meteorite with only 30 kilos of material available on our planet. The parent body of the ureilites is unknown. All show high carbon content, small grains of diamond result of high-pressure shock waves, along with graphite (low-pressure carbon.
More info here
http://www.daviddarling.info/encyclopedia/U/ureilite.html