There's only 4 ways to get gems.
1. Clear obstacles (such as rocks and trees)
2. Make it to the world leaderboard (top 20 players in each clan gets equal amount with the top 3 each having different amounts) No.1: 50000/clan No.2: 30000 No.3: 15000
3. Completing achievements award you gems
4. Buying gems
Don't trust gem generators.
No
18hours to the less
Not Many, But There Are A Few, Like A Unlimited Gem One, You press the move objects button, then you shut down your device completely, and restart Clash Of Clans. There you go!
No, it is the opposite. When you clear the gem box, it gives you gems. You usually get about 25 gems each time.
eubie
There are no codes in clash of clans.
There is no "best" base in clash of clans.
No, Clash of Clans is not available for Nook.
I got working cheat for clash of clans here: deluxesave.com/clash-of-clans-hack/
No, you must have an internet connection to play Clash of Clans.
Yes, if you are playing on an iDevice, the purchase will go through your iTunes account.
No, Clash of Clans has not yet been made for the Kindle.