Blue Crystals, or just Crystals, are a premium currency in Tarisland. Your first interaction with Crystals will be after completing the tutorial, which is a tad longer than it should be.
As Tarisland lets you roam freely, you’ll gain unlimited access to the game’s features. Up until that point, clicking Crystals wouldn’t result in a response, but the game will start talking money once the tutorial is done; Crystals aren’t cheap.
