I would accept the return of the stone with no questions asked. I'm pretty sure that someone just got really drunk and was trying to impress their date. Sad though as this was from Azuma's run, and I loved having the complete set (only one was missing).

I'll get the other two stones back and be able to figure out which one is missing next weekend. I'm traveling for MB this week and Norm is still driving home with all the stuff. Only one stone was missing (someone also took the Han Solo out of the hand of Frank Ippolito's insanely beautiful Rankor costume). We had 900 people in that club. Deadmau5 was playing. It was insane.
I have tweets from people who were filming the Deadmau5 set that saw all three stones at 12:30am. I heard about the missing stone an hour later. I'll photograph my two stones and look at my archives to figure out who went rogue. Does Azuma still make them?