Starstone

A starstone is made from 9 Star Pieces. A starstone can be crafted into a Skybeam Block, or it can be placed on the ground as a decoration block.

When placed on the ground, its texture resembles that of an emerald block but glowy and constantly shifting through the rainbow spectrum.

Recipe

Starstone have different color that depends on it's distance from the player looking.
It looks like a non place-able item, even though it is place-able.