How to retrieve a gem ? I didn't know that while being upgraded a defence item won't work during an att so i had a 10K gem that got stolen and i was the first in the league :/
To my knowledge, I'm pretty sure you have to have friends get it back for you. To do so, you may have to connect to your facebook and get friends on there to play the game and get your stolen gem back. It wont exactly retrieve the same exact gem that you had owned, but it will be a copy of the gem that had been stolen.
My question to the creators is how is it possible for a thief in-game able to go through a defense that is working and they have not used a trap disable potion and only died twice. I was watching the replay and all the other tries the thieves died by the traps, but the one that made it just went through two of the cannon shots and some how managed to come out unscathed.
(P.S. I'm not a creator, but I just wanted to help out with your problem.)