Diamonds are a universal currency in Farming Fever.
You can use them to:
  • Buy Boosters from the Daily Deals.
  • Buy Boosters once you've run out of them. This can be done before starting a level or while playing one.
  • Fully refill Lives to continue playing.
  • Buy extra customers if there weren't enough for you to complete a level.
  • Buy extra time if there wasn't enough of it for you to complete a level objective.
  • Complete a level with a restriction that you broke.
    For example, if you weren't allowed to throw away any goods, you can pay a few Diamonds to keep on playing.