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 three ways to start the Sand collection with the other being the Pond Island, or buying a sand minion.

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