Made an account so I can share this weird glitch with the Dragonborn DLC. I'll put my situation into a spoiler, so that way I don't ruin anyone's fun ;]

So, as I was completing the quest, I had found the left half of the amethyst claw. I had opened the other side and battled my way through until I found the room where the Draugr Overlords were hanging out (the room with the Shout in it). After I cleared out the room, I noticed one of the tombs didn't open. Unfortunately, I believe the Draugr has the Amethyst claw on him, locked up inside this tomb. (When I googled for help, another forum stated that you will find the claws when you search their bodies). I have a picture, but it will not let me insert it here (not allowed to post links).