How to Get Hellstone in Terraria — Underworld Mining Guide
How to Get Hellstone in Terraria — Underworld Mining Guide
⚡ QUICK ANSWER
Hellstone is mined in the Underworld (Hell) at the very bottom of the map. You need a Nightmare or Deathbringer Pickaxe (70% power) to mine it, and an Obsidian Skull equipped to prevent the 20 damage/sec fire burn. Smelt 3 Hellstone + 1 Obsidian = 1 Hellstone Bar at a Hellforge. You need 135 ore (45 bars) for full Molten Armor.
| Detail | Info |
|---|---|
| Location | Underworld (Hell) — very bottom of the world map |
| Appearance | Dark red-orange ore in Ash Stone blocks |
| Pickaxe required | Nightmare / Deathbringer Pickaxe (70% power minimum) |
| Fire damage | 20 damage/sec when touched — prevented by Obsidian Skull |
| Smelting ratio | 3 Hellstone + 1 Obsidian = 1 Hellstone Bar (at Hellforge only) |
| Ore for full Molten Armor | 135 Hellstone + 45 Obsidian (45 bars) |
How to Get Hellstone — Step by Step
Get the prerequisites before going to the Underworld
Three things are required before you can mine Hellstone efficiently. First, a Nightmare or Deathbringer Pickaxe — crafted from Demonite or Crimtane Bars after defeating the Eye of Cthulhu or Eater of Worlds/Brain of Cthulhu. Second, an Obsidian Skull (20 Obsidian at Work Bench) to prevent fire damage. Third, access to the Underworld itself — dig a straight vertical Hellevator or find a natural path down. Without the 70% pickaxe, Hellstone blocks will not break no matter how long you mine them.
✅ Prerequisites: Nightmare Pickaxe + Obsidian Skull + path to UnderworldReach the Underworld
The Underworld is the deepest layer of the world — below all cave systems and directly above the map boundary. Descend through your Hellevator or natural caves until the background becomes a dark red-orange hellscape with lava lakes, fire, and Ash blocks everywhere. Underworld enemies (Demons, Bone Serpents, Fire Imps) are significantly more dangerous than anything above, so arrive with full health and good gear. The Underworld contains abundant Hellstone deposits scattered throughout the Ash blocks on the floor and walls.
🔥 Underworld = dark red background, lava lakes, Ash blocks — deepest layerEquip your Obsidian Skull accessory
Before touching any Hellstone, make sure your Obsidian Skull is equipped in an accessory slot — not just in your inventory. Holding it in inventory does nothing. With it equipped, walking on or next to Hellstone blocks deals no fire damage. Without it, every Hellstone block adjacent to you deals 20 damage per second — which adds up fast when you are surrounded by a vein of ore. This is the single most important preparation step for Hellstone mining and is trivially cheap to craft (20 Obsidian).
🛡️ Equip Obsidian Skull in accessory slot — not just inventoryMine Hellstone deposits in the Ash floor
Hellstone appears as dark red-orange ore veins embedded in the Ash Stone blocks that make up the Underworld floor and walls. It is abundant — you will see it constantly as you explore. Mine it with your Nightmare or Deathbringer Pickaxe (normal mining speed). Watch out for lava beneath Hellstone deposits — mining blocks above a lava pool can cause lava to flow and fill your work area. Use a Bucket of water to solidify lava into Obsidian before mining nearby deposits, which also gives you the Obsidian you need for smelting.
⛏️ Dark red-orange veins in Ash — abundant throughout the Underworld floorFind a Hellforge and smelt Hellstone Bars
The regular Furnace cannot smelt Hellstone — you need a Hellforge, found inside the small brick buildings scattered across the Underworld. Walk into these houses, pick up the Hellforge with your Nightmare Pickaxe, and bring it back to your base. Once placed, stand next to it and smelt: 3 Hellstone + 1 Obsidian = 1 Hellstone Bar. The Obsidian is easy to make in the Underworld itself by pouring water over any lava pool. A single Hellforge serves for the entire game and doubles as a regular Furnace too.
🏗️ Hellforge in Underworld buildings — mine it and bring it back to your baseCraft Molten Armor and Hellstone weapons
With Hellstone Bars at your Iron Anvil, craft the pre-Hardmode endgame gear. The Molten Armor set needs 45 bars: Molten Helmet (10), Molten Breastplate (20), Molten Greaves (15). The Fiery Greatsword (20 bars) is a Night’s Edge component. The Hellwing Bow (10 bars) is one of the best ranged weapons for the Wall of Flesh fight. At 25 defense, Molten Armor is the strongest pre-Hardmode armor and the standard loadout for the Wall of Flesh encounter.
🏆 45 bars = Molten Armor | 20 bars = Fiery Greatsword | 10 bars = Hellwing BowPro Tips
Solidify lava before mining nearby Hellstone — pour a bucket of water over lava pools adjacent to your mining area to turn them into Obsidian and prevent lava from flooding your workspace.
The Obsidian Skin Potion (Bottled Water + Obsidifish + Fireblossom) grants full lava immunity for 4 minutes — even better than the Obsidian Skull for extended Underworld sessions.
Build a platform bridge across the Underworld first before mining seriously — it makes navigation much easier and gives you a safe surface above the lava level to stand on.
Bring a Magic Mirror or set a Bed spawn in the Underworld — if you die down there, the long walk back is a major time sink without a nearby spawn point.
Mine extra Hellstone beyond what you need for Molten Armor — once you enter Hardmode you will return to the Underworld for the Wall of Flesh fight, and having extra Hellstone Bars means you can craft additional items immediately after.
Hellstone is the final ore tier of pre-Hardmode Terraria and marks the last major resource goal before fighting the Wall of Flesh. The Underworld is the most dangerous environment you have encountered at this stage — Fire Imps shoot fireballs, Bone Serpents chase you through walls, and lava is everywhere. But the rewards are proportional: Molten Armor, the Fiery Greatsword, and the Hellwing Bow represent the absolute peak of pre-Hardmode gear. Mining enough Hellstone for full Molten Armor and key weapons signals that you are ready for the Wall of Flesh and the transition into Hardmode.
Frequently Asked Questions
What pickaxe can mine Hellstone in Terraria?
You need a pickaxe with at least 65% power to mine Hellstone. The Nightmare Pickaxe and Deathbringer Pickaxe both have 70% power and are the earliest tools that can mine it. Gold and Platinum Pickaxes at 55% cannot break Hellstone blocks.
How do you smelt Hellstone in Terraria?
Hellstone requires a Hellforge — found in brick buildings in the Underworld — to smelt. The regular Furnace cannot process Hellstone. The recipe is 3 Hellstone + 1 Obsidian = 1 Hellstone Bar. Mine a Hellforge and bring it back to your base before smelting.
Why does Hellstone hurt you in Terraria?
Hellstone blocks deal 20 fire damage per second when touched. Equipping an Obsidian Skull (20 Obsidian at Work Bench) in an accessory slot prevents all fire block damage including Hellstone. The Obsidian Skin Potion also grants full lava and fire immunity temporarily.
How much Hellstone do you need for Molten Armor?
The full Molten Armor set requires 45 Hellstone Bars — which means 135 Hellstone Ore and 45 Obsidian. The Molten Helmet needs 10 bars, the Molten Breastplate 20 bars, and the Molten Greaves 15 bars. Mine extra for the Fiery Greatsword (20 bars) and Hellwing Bow (10 bars) if you plan to use those as well.