This is a GRAPHITE END CUT of the Canyon Diablo meteorite, it weighs 51.5 grams.   Canyon Diablo was found around Meteor Crater in 1918. It is an (IAB) Coarse octahedrite bandwidth 2mm. Hunting has been closed at the crater so better get yours while you still can.

                                  This a graphite nodule with no visible metal!      This is rarley seen most of the graphites have metal veins running through them.

                                                                               42mm X 36mm