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 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.