From Starbounder - Starbound Wiki
Removed: No Longer Available
Smooth Concrete was removed from the game files, and is no longer obtainable.
It was included as placeholder content during early access, and replaced before full release
Smooth Concrete was a construction block found inside dungeons.
| Floran :
||Sssmooth con... crete?|
| Glitch :
||Statement. Smooth concrete.
|| /spawnitem smoothconcrete