Diamonds what is the use?

Diamonds are the premium currency of the game. They allow you to growfaster, shorten the production period of buildings and units, buyspecial units, change the weather and many more things. Additionally,you can exchange diamonds for resources like money and gold. Topurchase diamonds, click on the big diamond icon in the main menu onthe bottom of the screen or the + icon next to your current diamondquantity at the top of the screen. This will open a new window whereyou can select your payment method and your desired quantity. Keep inmind that diamonds and their quantity may vary depending on thepayment method you choose. We strongly suggest you compare them andchoose the best option for you. After your payment has been processed,the diamonds will be credited directly to your account."