I finished this one a few weeks ago but just got pics done of it.  It is made from a Resin Werks Studio nebula pen blank and has a glass cabochon in the end of the cap.  It posts, although with the resin I wouldn't want to post it to hard.  The cap comes off in a but under 1 1/2 turns.  (I am for somewhere between 1 and 1 1/2.)