I'm not sure but I think it might be either the ring finger of the doctor (Clark might have took his time and found it before burning all) or the knife he used to kill him... ヾ(☆▽☆)
oooh... n here i thought it might b something related to Alex ..i really wanted them to end up together seeing how their characterr were a bit similar to eachother( ̄∇ ̄")
what was clark holding in his hand on page 9 last chapter(⊙…⊙ )