This nice stone is not stolen. It is in an opencache http://www.opencaching.de/viewcache.php?wp=OCAF20, which we found not because we want. Only with a little bit luck, by searching a stage of the cache where it is http://www.geocaching.com/seek/cache_details.aspx?guid=16b9df28-398a-4bb6-8483-99da532a32c3.
Be hopeful, some cachers would come and found the opencache too, and pick up your TB. wedge&nina
P.S.: Maybe take tb-rescue http://www.tb-rescue.com/ for getting help