Not to be confused with the Smooth Sandstone Wall, the only non-natural Sandstone Wall.
Sandstone Walls are naturally-generating background walls found in the Underground Desert. Underground Deserts generate by default the normal Sandstone Wall which may be converted into Ebon-, Crim-, and Pearlsandstone Wall if exposed to the Corruption, Crimson, and Hallow, respectively. Converted Sandstone Walls may further spread conversion to other walls. See biome spread for more information. These walls can be destroyed with a hammer, but will drop nothing. These walls also do not stop enemies from spawning and cannot be used for proper housing.
PC version, 
Console version, 
Mobile version, and 
Crimsandstone Wall4
Work Bench and Ecto Mist
Ebonsandstone Wall4
Pearlsandstone Wall4
Sandstone Wall4
Treacherous Sandstone Wall
Shimmer Transmutation
Crimsandstone Block
Ebonsandstone Block
Pearlsandstone Block
Sandstone Block
Old Chinese version and 
tModLoader 1.3-Legacy version, Sandstone Walls placed by the player are, unlike other placeable walls, not suitable for housing and will instead allow unique Underground Desert enemies to spawn.Verify On the 
tModLoader version they work however like normal walls; allowing housing and preventing enemy spawns.
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