Hellstone Brick

Hellstone Bricks require 1 Hellstone and 1 Iron Pickaxe to craft, which is inefficient as Iron Pickaxes do not stack; it is generally easier to mine the buildings in The Underworld for them. Players without an Obsidian Skull in their accessory slot will take damage from touching the brick. As with most damaging blocks, NPCs and enemies will not take any damage from contact with Hellstone Bricks.

Unlike Hellstone itself, Hellstone Bricks aren't immune to dynamite's explosions but are immune to bomb's explosions.