If desired, crystals can be purchased at any time in the bank, and if a mysterious purple crystal falls on your island, then you can get 2 or even 3 times more crystals at the regular price!

Crystals are given for completing tasks, gaining levels and achievements, as a reward for logging into the game every day, or from free bonuses that can be found on our official Facebook page every Friday.
Don't forget that the more effort you put into participating in competitions and allied missions, the better the reward will be and the more crystals you will receive!