The gem is just the thing in the middle lower part of your cgat screen when you long on to bnet, if you click it , it says activated/deactivated, i think personaly when you click it it scans your diablo II for third party programs wild guess. Also far as iknow soh does nothing its just junk, but yet it has a lvl req, also awhile back when someone mentiond the den of evil it says FROM the den of evil, maybe something comes from there, or the soh could be a dupe detection item, scans all you items for duped ones and delets them, and there is no way it will replace currency since it can be gotten so easily