So basically before I knew what they even were I just picked them up everywhere bc I figured they were worth something so I had 12. Then I joined the thieves guild and started "no stone unturned". Unfortunately I forgot the 12 places I retrieved the gems from, so I had to go through a list of 24 places (again). I went through the entire list now I have 23/24. The last was from the dark brotherhood sanctuary, which I destroyed. It wasn't on the dresser. I'm not sure if I already picked it up from there or if my game is glitching (a common glitch I've heard). Am I basically screwed? Should I go through all 24 places again? (I play on 360 btw).