From Starbounder - Starbound Wiki
Ancient Brick is an object unobtainable by players through normal means. This item's information is present in the game files, but not intended by developers to be in players' possession.
Ancient Brick is a construction block.
|Floran :||Ancient carved brickss.|
|Glitch :||Impressed. These ancient bricks have withstood the ravages of time.|
|Novakid :||Some mighty old lookin' bricks.|