I was wondering whether you would consider a new idea about raiding gems too?
The gem boxes you kindly leave in our bases, how about putting a timer on them? If you had a timer of 24 hours or even 48 hours which counted down, similar to the shield. And then after that ran out, the next person to attack the base would have the option of attacking the gem box too. You could put a high hit value on it so it wouldn't be a quick steal.
This would encourage people to spend more time checking their bases.

