# Crystals

Yomi Gardens Crystals are premium tokens for the game. It can be purchased inside the game, and can also be earned by completing in-game milestones and other tasks. Crystals are not crypto tokens, but may later be exchanged for a separate on-chain fungible token on an external website.

Another way to think about Crystals is that it works similarly to other mobile games' premium currency, except that it's liquid and tradable. Crystals will be needed to progress through various parts of the game or will make some parts easier, but Yomi Gardens will remain free-to-own and is intended to be enjoyed by everyone, at all stages of the game.

Players will not require any special crypto knowledge or register for a crypto wallet to earn or use Crystals. Our proprietary [backend technology](broken-reference) will make this process seamless for all players, if and when they decide to exchange Crystals for a crypto token equivalent later.
