Or, at least that's the way it's supposed to be but apparently the only way to identify the "unidentified gem" is to become part of the Thieves' Guild. I know that there are some goodies I'll miss out on that are endemic to the Thieves' Guild itself but, unless I can overthrow them from within and land them all in jail, I've no desire to join them. However, I'm curious to know what else I'm giving up regarding the gem-related quest itself but, so far, haven't been able to find a reliable source. Anyone have a moment to clue-in a poor RPer, so I can look longingly?
(/would kill for a way to 'ignore' or 'reject' a quest if you're just not going to do it, just to avoid the journal-clutter)

