If you’ve ever tried to build a nether portal, craft an enchanting table, or put together a blast-proof base in Minecraft, you know obsidian is one of the most useful resources in the game. Many new players struggle to figure out how to make obsidian in Minecraft without wasting diamonds or getting burned by stray lava flows. I’ve been playing Minecraft on and off for over a decade, and I’ve messed up more obsidian runs than I can count — from accidentally turning an entire lava lake into cobblestone to mining 10 blocks with an iron pick before realizing I wouldn’t get any drops. I put together this no-fluff guide to help you get it right every time, no matter if you’re playing survival, creative, or on a multiplayer server.
What You Need Before You Make Obsidian in Minecraft
Obsidian only forms under very specific conditions, so you’ll need to gather a few key supplies before you head out looking for lava. You don’t need late-game gear to get your first few blocks, but having the right items will save you a lot of frustration and avoidable deaths. I recommend packing extra food and a few blocks to build temporary platforms if you’re exploring deep caves or the nether for lava sources.
- A full water bucket (you can use an infinite water source to refill if you’re farming multiple blocks at once)
- At least one lava source block (flowing lava won’t turn into obsidian, so make sure you’re targeting still, non-moving lava)
- A diamond or netherite pickaxe if you plan to move the obsidian after it forms (if you’re building a portal in place, you can skip this, but it’s still handy to have for unexpected obstacles)
- Optional: Fire resistance potions or cobblestone blocks to block lava flow if you’re mining in the nether or near large underground lava lakes
One thing most new players miss is that you don’t actually have to mine obsidian to use it. If you’re building a nether portal right above a lava lake, you can form the obsidian blocks directly in the shape of the portal and skip mining entirely. That’s a great trick if you haven’t found diamonds yet and need to get to the nether fast.
Step-by-Step Process to Make Obsidian Safely
Once you have all your supplies gathered, the actual process of making obsidian is pretty straightforward, as long as you pay attention to the order of operations. First, scout out a safe lava source that you can access without falling in or getting attacked by mobs. I prefer shallow underground lava lakes over deep ones, because you don’t have to worry about lava flowing down on you from above.
Next, build a small temporary block platform one block above the surface of the lava lake. Place your water bucket on the edge of this platform so the water flows out and covers the surface of the lava, not directly into the middle of the pool. Never place water directly into the lava pool if you’re at ground level, as this can cause lava to splash back and set you on fire, or even push you into the lava entirely.
You’ll hear a faint hissing sound, and the lava source blocks under the water will immediately turn into obsidian. Flowing lava under the water will turn into cobblestone or stone, so you may have to dig around a little to find all the actual obsidian blocks. If you want to collect the obsidian, equip your diamond or netherite pickaxe and mine each block — it takes about 9 seconds per block with an unenchanted diamond pick, and just over 2 seconds with an unenchanted netherite pick.
Once you’re done collecting, pick the water block back up with your empty bucket. If you leave the water flowing, you might accidentally turn more lava into cobblestone before you’re ready, which wastes potential obsidian blocks for future runs.
Easy Ways to Farm Unlimited Obsidian Stacks
If you need a lot of obsidian for large builds, ender chests, or multiple nether portals, exploring for lava lakes every time you need more will get old fast. There are a few simple farm setups that let you generate as much obsidian as you want without leaving your base, as long as you have the right supplies.
Renewable obsidian farms only work if you pair them with a pointed dripstone lava farm, a feature added in the Caves & Cliffs update. Before that update, obsidian was a non-renewable resource, so you were limited to the lava lakes you could find in your world. Now, you can generate infinite lava with a dripstone setup, and pair it with an infinite water source to make obsidian on demand.
For a basic afk obsidian farm, build a small enclosure with a spot for your infinite lava source to pour into a trough, and a water source that flows over the trough to turn the lava into obsidian. Add a hopper minecart system under the trough to automatically collect the obsidian as you mine it, and you can sit back and farm hundreds of blocks in an hour without much effort.
If you’re playing in the nether, you can’t use water to make obsidian — it evaporates immediately when you place it, so don’t waste your water buckets trying. If you’re playing on a multiplayer server, always ask before farming obsidian from public nether portals, as many communities reserve those for fast travel around the server, and breaking parts of them can get you banned.
Common Mistakes to Avoid When Working With Obsidian
Even long-time players make silly mistakes with obsidian from time to time, so I’ve rounded up the most common ones to help you skip the frustration. First, never try to mine obsidian with a pickaxe lower than diamond. You’ll spend 10 minutes breaking the block, and it won’t drop anything for you to pick up. I learned this the hard way on my first survival world, when I wasted 20 minutes mining obsidian with an iron pick before I realized I wasn’t getting any drops.
Second, always secure your lava and water sources before you start making obsidian. If you accidentally knock the water block away while you’re mining, the lava can flow out and burn down your base, or wipe out your crop farm if it’s nearby. I like to build a 2-block high cobblestone wall around the entire work area to contain any stray flows before I start.
Third, don’t waste obsidian on decorative builds unless you have a fully operational farm. It takes a lot of time to mine, and you’ll need most of your early obsidian for nether portals, enchanting tables, and ender chests. Obsidian is completely blast-resistant to all explosions except wither and end dragon attacks, so save it for base walls around creeper-prone areas, or for chest rooms where you store your most valuable items. It’s also worth noting that obsidian can’t be moved by pistons, so plan your build layout carefully before you place any blocks.
At the end of the day, learning how to make obsidian in Minecraft is a core skill that unlocks almost all late-game content, from nether travel to enchanting to ender chests. You don’t need fancy gear or mods to get started, just a little patience and attention to avoid the common pitfalls I mentioned above. Next time you’re digging through a deep cave and spot a lava lake, you’ll know exactly how to turn that dangerous hazard into one of your most valuable resources. Happy mining!