Obsidian is a block created whenever water touches lava. When this occurs, the lava or water (whichever is below the other material) becomes Obsidian. It can only be mined with a Nightmare Pickaxe/Deathbringer Pickaxe or better. However, if the player creates obsidian directly on their spawn point (not a bed) and then teleports back there, the obsidian will be broken. This is the only other method of mining obsidian other than using bombs. Gathering obsidian through the use of dynamite proves the most effective when it comes to using explosives.
Terraria - Obsidian Generator

Terraria - Obsidian Generator

Obsidian can be crafted into an Obsidian Skull, an accessory that provides protection from ores such as Hellstone and Meteorite ore when equipped. Obsidian is also a component required for crafting Hellstone Bars, as well as Obsidian Skin Potions. Obsidian is hard to find naturally due to Water rarely spawning on Lava, but the use of a Bucket makes gathering Obsidian much easier. If you don't have a Nightmare Pickaxe you can also use Dynamite or Bombs to blow up the ores and gather it, although caution is advised; Bombs being the safer of the two options due to their smaller explosion radius.

Creating Obsidian below the ground:

  1. Find an Underground body of water.
  2. Dig a tunnel at the bottom of this water, so that the water drains lower and lower.
  3. Whenever you see a cave or another body of water through the walls, connect your current tunnel to them so that the water drains faster and there is more water.
  4. If you are running out of air, dig a small side passageway with a "bubble" above the water level so you can breathe from time to time.
  5. Continue your ever expanding water tunnel until you find lava. When you find lava, allow the water to come in contact with the lava to produce Obsidian.
  6. Using this method, you should have a near limitless supply of water above you, and can therefore produce as much Obsidian as you want.

This method is quite tedious considering the simplicity of building a water generator.

Creating obsidian in the underworld:

  1. Find an ocean, which should be on either edge of the map.
  2. Build your hellavator next to the ocean.
  3. Once your hellavator is complete, create 1-block gaps in the sides of it so water will flow onto the surface of the underworld.
  4. Remove the sand blocks between the ocean and your new hellavator and wait for the ocean to drain out into it.
  5. The underworld will be partially flooded, rendering the surfaces of some lava pits harmless.
  6. The water will eventually drain out due to the underworld's intolerance to water.
  7. When mining Obsidian from lava pits in this fashion, you will need a Nightmare Pickaxe or Deathbringer Pickaxe, as bombs are too sloppy. Stand directly on the Obsidian block of choice and mine it. Then fill it in with a non-falling block. Any other way and the Obsidian will either burn up in lava or you will.

Building a simple Obsidian farm:


A simple obsidian farm

  1. Build a large container (about 20x20) out of blocks. To avoid accidents, be sure to use a sturdy material such as dungeon bricks.
  2. Build two smaller containers (10x10) next to it.
  3. Craft four sets of Inlet and Outlet Pumps.
  4. Pour water in one container and lava in the other, and set up a pump in each to duplicate the liquids inside of them.
  5. Place an inlet pump in the top part of each container, and link it to an outlet pump inside the bigger container.
  6. Link all sets of pumps to a Switch or Lever.

The large container should fill completely with Obsidian within minutes.


  • Prior to 1.0.2 Obsidian could be mined using any pickaxe. In patch 1.0.2 and later versions, Obsidian can only be mined with a Nightmare Pickaxe or better.
  • Even though Obsidian is of White rarity, it doesn't get destroyed by Lava when completely submerged.
  • Obsidian can be broken if it is created at the spawn point of the player. When they teleport back to it, they will break the obsidian. This only works if the obsidian is actually above the ground where the player spawns.
  • Obsidian doesn't form when water pours onto a block of lava which has an environmental doodad submerged in it. The water will keep draining and annihilating until the doodad is removed.
  • When portrayed in game, obsidian appears to be a purplish-black color, even though in real life obsidian is black. This is most likely due to the fact that a completely black block wouldn't be aesthetically pleasing.

Update Info


  • Max stack increased from 250 to 999.


  • Now requires Nightmare Pickaxe/Deathbringer Pickaxe or higher to mine.

PC release

  • Added to the game.


Original Metals Alternative Metals

Copper Ore Copper Ore

Copper Bar Copper Bar

Tin Ore Tin Ore

Tin Bar Tin Bar

Iron Ore Iron Ore

Iron bar1 Iron Bar

Lead Ore Lead Ore

Lead Bar Lead Bar

Silver Ore Silver Ore

Silver bar1 Silver Bar

Tungsten Ore Tungsten Ore

Tungsten Bar Tungsten Bar

Gold Ore Gold Ore

Gold Bar Gold Bar

Platinum Ore Platinum Ore

Platinum Bar2 Platinum Bar

Demonite ore1 Demonite Ore

Demonite bar Demonite Bar

Crimtane Ore Crimtane Ore

Crimtane Bar Crimtane Bar

Hard Mode Metals

Cobalt Ore Cobalt Ore

Cobalt Bar Cobalt Bar

Palladium Ore Palladium Ore

Palladium Bar Palladium Bar

Mythril Ore Mythril Ore

Mythril Bar Mythril Bar

Orichalcum Ore Orichalcum Ore

Orichalcum Bar Orichalcum Bar

Adamantite Ore Adamantite Ore

Adamantite Bar Adamantite Bar

Titanium Ore Titanium Ore

Titanium Bar Titanium Bar

Chlorophyte Ore Chlorophyte Ore

Chlorophyte Bar Chlorophyte Bar

Hallowed Bar Hallowed Bar

Shroomite Bar Shroomite Bar

Other Minerals & Materials

Meteorite ore Meteorite Ore

Meteorite bar Meteorite Bar

Hellstone1 Hellstone

Hellstone Bar Hellstone Bar

Ectoplasm Ectoplasm

Obsidian1 Obsidian