This is an interesting one! It is a very well crystallized, elongated crystal or crystals of native copper, perhaps twinned, in a long aggregate. Look at the sharpness of the crystal on the end! The thing is, the bas does not naturally belong to the elongated crystal. The elongated crystal has been inserted into a hole drilled in the base. I know. It is unusual! Like a paper weight. It is an extremely well crystallized specimen of native copper!