Diamonds are the premium currency in the game. They allow you to grow faster, shorten the construction times of buildings and units, buy special units, change the weather and much more. You can also convert diamonds into resources such as game dollars and gold.
To buy diamonds, click on the icon with the big diamond in the main menu, which is at the bottom of the window, choose the "+" next to your current amount of diamonds or the diamond icon in the top left corner. This will open the shop where you can choose the number of diamonds you want to buy as well as the payment method.
Note that the amount of diamonds can vary, depending on which payment method you choose. Accordingly, we recommend you to compare this and to assess which variant is the best for you. After the payment process is completed, the diamonds will be credited directly to your account.