I'm trying to finish the "No Stone Unturned" quest and have so far found 22 of the 24 stones.
Since I have yet to purchase Proudspire Manor and I haven't been in there by any other means I know where to find at least on of the two remaining stones.

I picked up 9 of the stones during other quests, but have not recorded their location myself so I used the UESP list found in the accepted answer in the question http://gaming.stackexchange.com/questions/37343/where-are-all-the-stones-of-barenziah-located-no-stone-unturned to try and track the others.

Having been to all the locations (except Proudspire Manor) on the list I am still short one stone. 
I expected to find it in the Thalmor Embassy but I cannot enter it. 
This should be fixed with patch 1.4 but I cannot find it in the Reeking Cave either.

So is there a way to tell which Stone of Barenziah in your inventory is found where so I either have some closure on this?
Note that I play the game on the XBox so I have no access to game data or the in-game console.