I know that Dynamite can destroy Hellstone Bricks but not Hellstone Ore, and that Dynamite can destroy meteorite, ebonstone, and the suit of "uninteresting" (Stone/Dirt/Mud/Grass) blocks.
Is Hellstone Ore the only dynamite proof blocks, or are there others as well? (Dungeon Bricks perhaps, or obsidian?)
Best Answer
As of 1.1.1, this is a complete list of all things immune to Dynamite (and Bombs, too):
Additionally, unsafe background walls (such as natural Dirt or generated Dungeon Brick Walls) are immune, unless the explosion reaches the edge of (or a hole in) the wall.