Hardened Sand Blocks

The Hardened Sand Block is a type of block, along with Sandstone Blocks, that makes up the Underground Desert. It looks like Sand Blocks with an altered texture and slightly different color, but it is not affected by gravity. Like all sand-based blocks it has Corruption, Crimson, and Hallowed counterparts: Hardened Ebonsand, Hardened Crimsand, and Hardened Pearlsand repesctively.

Trivia

 * Unlike other items used in crafting recipes, a Hardened Sand Block's tooltip does not contain the Material tag.