Desert Island

Desert Island is an island spawner item that requires to craft, and that spawns a desert island upon 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.