Desert Island

Desert Island is an Island that is unlocked at. It spawns a desert island on use.

Spawn island
Placing the item on the Private Island will spawn a Desert Island 16 blocks away in front of the player.

It is one of only four ways to start the Sand collection with the others being the Pond Island, buying a Sand Minion, or the desert settlement.

Spawn crystal
Spawning one is currently the only known way of obtaining the Desert Crystal.

Trivia

 * Before the Mushroom Desert Revamp update this island was only source of the Sand collection