Stone Platform

The  is an item that is used to create a 8x8 stone platform, made of mossy and normal stone bricks, 10 blocks away from you on your Private Island. The recipe is unlocked at. The centre of the platform is created where the Stone Platform item lands after travelling for 10 blocks.

Crafting
Its created with 64 Stone Bricks, and one Egg:

Trivia

 * Currently, throwing it into the void seems to create the stone bricks at the top of the world.