I have started the "Under Saarthal" quest and once I remove the amulet from the door and get trapped, it does not show up in my inventory. I have re-loaded several times with no luck. In one case I even reloaded to the start of entering the quest and then went off and completed other quests and sold stuff etc. but when I returned to the quest, the same issue occurred at the exact same point. Again, I have reloaded but to no avail. I have confirmed that I am not looking for the wrong item, it is simply not in my inventory. This issue is preventing me from progressing the Mage's and Forbidden Legend questlines. Any ideas?
This seems to be a bug in Skyrim. If you're on PC I would recommend you download the "Unofficial Skyrim Patch" as it fixes a lot of these bugs.
Again, if you're on PC you can add the item to your inventory by typing:
player.additem 000233D0 1
This should add the amulet to your inv, and the quest should go on as usual! :)
I might be 3 years late, but I found a solution for myself. I have encountered the exact same thing, annoying as warm sticky fudge. No site could provide me the help I needed so I forgot about the whole thing, still freaking annoyed. I could not add the item cause it would not appear in any way in my inventory. And then it came to me, I solved once a bug by clearing all my bounties, and so I did that and bam. I had 2 saarthal amulets in my invent (cause I tried 2 times to spawn it in) went back to saarthal, it was a bit awkward for a moment but now I finally have finished this fudging quest. Hope this still helps
Lazy person from the future