On this website you will find information about gem generator for clash of clans. This is first working and even free edition of this kind of tool for Clash of Clans game. With this tool you can get infinite resources which can be gained only for real money. The most important one are gems. In addition you can receive gold, dark elixir and classic pink elixir.
I've contacted team which made this incredible Clash of Clans Online Cheat and they said it is their biggest project. It took them months to finish overall project and present it in pretty nice online version. Clash of Clans is very well known game and you probably need tons of resources. So act now. It hasn't been patched since 6 months. There is almost no risk as game is too popular and they can't catch every cheating person.