|Use Time||14 (Very Fast)|
|Sell Value||No Value|
Hellstone is an ore and material that produces the highest tier items in the game until you defeat the Wall of Flesh to activate Hard Mode. It is only found in the Underworld. Mining Hellstone now requires a pickaxe with at least 65% pickaxe power. The first pickaxe that can mine hellstone will likely be the Nightmare Pickaxe or the Deathbringer Pickaxe (The crimson equivalent to the Nightmare Pickaxe) although it is possible to find a Drax (with 200% axe and pickaxe power) in a shadow chest in the Underground Jungle biome. Hellstone can be smelted into Hellstone Bars at a Hellforge and Adamantite Forge (obtainable in Hardmode), and as of 18.104.22.168.1, it requires only 3 Hellstone and only 1 Obsidian. Like most other ores and soils, it can also be crafted into a Hellstone Brick, but not into Hellstone Wall, at any furnace. When converted to Hellstone Bars, they can be used to create powerful new molten variations of weapons and armor. Hellstone deals 20 fire damage to the player (before defense) when they touch it, unless they wear an Obsidian Skull, Obsidian Horseshoe, Obsidian Shield, Ankh Shield, Obsidian Water Walking Boots, or use an Obsidian Skin Potion. Hellstone has no value when sold to vendors.
Mining Hellstone can be a pain, not only because Hellstone deals fire damage to the player (which can be negated with an Obsidian Skull); but mainly because of the dangerous monsters of The Underworld, as well as the fact that Hellstone now spawns lava (half a block per block of Hellstone ore) when mined.
One approach to mining Hellstone can be to just drop down to the Hellstone/Ash "floor" and start digging out the Hellstone. One must keep in mind, however, that Hellstone Bars are very expensive and difficult to acquire as 3 pieces of Hellstone and 1 piece of Obsidian are required to forge only one bar.
A third method requires several Obsidian Skin Potions. You may also want to use a Cloud in a Bottle, Rocket/Spectre Boots, Flippers, or a Grappling Hook. Find a pool of lava, use the potions and jump in. They are usually large. Simply use the Grappling Hook to stick close to the Hellstone while you mine it, escaping using your preferred method when your potion supply runs out. This technique will allow you to collect a decent amount of Hellstone, depending on how many potions you have. The forth method is to dig all around the hellstone leaving one layer of any block between you and the hellstone. Then you can grapple on to the block and mine it through the block and still pick the hellstone up.
Dealing with the Hellstone itself
As for dealing with the lava that is spawned when Hellstone is mined, you can use an Obsidian Skin Potion to negate damage from lava, as well as preparing a lava barrier to keep the lava from spilling onto you, and simply mine the Hellstone from behind the barrier. Prior to Update 1.1, you could also safely mine Hellstone by placing blocks of sand to soak up the lava formed as the Hellstone blocks broke. Another way is after mining 2, use a bucket and take the lava out.
- Hellstone will not spawn lava when mined if it is located outside of the Underworld.
- Hellstone does not hurt NPCs when they touch it. For some reason.
- Hellstone was added after a user suggested a "firestone" of sorts. 
- Changed the recipe from 4 Hellstone and 1 Obsidian to 3 Hellstone and 1 Obsidian.
- Max stack increased from 250 to 999.
- Can be destroyed by explosions once the Wall of Flesh has been killed.
- Now gives off fiery sparks (Graphical effect only).
- Spawns lava when mined, but only when mined in the Underworld.
- Added to the game.
|Original Metals||Alternative Metals|
|Hard Mode Metals|
|Other Minerals & Materials|
|Items Requiring Hellstone|
|Tools||Molten Pickaxe · Molten Hamaxe|
|Weapons||Fiery Greatsword · Flamarang · Hellfire Arrow · Imp Staff · Molten Fury · Phoenix Blaster|
|Armor||Molten Helmet · Molten Breastplate · Molten Greaves|
|Potions||Flask of Fire|
|Other||Hellstone Bar · Hellstone Brick|