Kyanite is a rare blue crystalline mineral essential for finishing your journey in Subnautica. Without it, you can't craft the deepest vehicle depth modules or complete the game's final story objectives. It sits deep within the planet's most volatile volcanic biomes, requiring proper vehicle preparation and thermal management to harvest safely.
You'll find kyanite exclusively in the Inactive Lava Zone and the deeper Lava Lakes, starting at around 900 meters below the surface. Smaller chunks lie loose on the seabed and around the Alien Thermal Plant, while massive resource deposits require a Prawn Suit equipped with a Drill Arm. Gathering your first pieces without dying to heat damage or aggressive fauna requires knowing exactly where to look and what gear to bring.
Preparing for the Deep Dive
Heading down for kyanite demands a fully upgraded vehicle setup. Venturing past 900 meters will crush a standard Cyclops or Prawn Suit instantly.
Before making the descent through the Lost River, make sure you've gathered nickel, crystalline sulfur, and various advanced metals to build your tier-three depth modules.
- Prawn Suit Setup: Equip your Prawn Suit with a Depth Module MK2 or MK3, a Jump Jet Upgrade to navigate steep drops, and the Drill Arm to mine large kyanite formations.
- Cyclops Setup: Install the Cyclops Depth Module MK3 to reach 1,300 meters, along with a Shield Generator and Fire Suppression System to handle hostile leviathans in the lava zones.
- Survival Gear: Bring a Rebreather, a High Capacity Oxygen Tank, a Thermblade, and plenty of filtered water or a Water Filtration Suit because ambient temperatures drain your thirst fast.
Where to Find Kyanite Locations
Kyanite doesn't spawn anywhere near the safe shallow waters. It rests exclusively in high-temperature geological zones near the planetary core.
The Inactive Lava Zone (ILZ)
Beginning around 900 meters deep, the Inactive Lava Zone features a massive alien structure known as the Lava Castle sitting right in the center. You can find loose pieces of kyanite scattered across the obsidian floor and glowing flat rocks around the base of the castle.
Look carefully around thermal vents and glowing lava flows. The blue crystals contrast sharply against the dark red and black rock, making them easy to spot if you carry a good flashlight or vehicle floodlight.
The Lava Lakes
Dropping past the Inactive Lava Zone brings you to the Lava Lakes at roughly 1,300 to 1,400 meters deep. This is the home of the Primary Containment Facility.
The lake bed is covered in massive, indestructible large resource deposits of kyanite. You'll need your Prawn Suit drill arm to harvest these formations. Watch out for the Sea Dragon Leviathan patrolling this open magma chamber, as it can deal heavy damage to vehicles in just a few hits.
How to Mine Kyanite Efficiently
Mining kyanite depends entirely on the size of the crystal formation you encounter. Small, raw chunks of kyanite lie loose on the seabed. You can pick these up by hand and store them directly in your inventory, exactly like copper or titanium. Each loose piece takes up a single inventory slot.
Large kyanite deposits require a Prawn Suit with a Drill Arm. Approach a large cluster and use the drill arm until it breaks apart. Each large deposit yields between six and twenty-two individual pieces of kyanite, making this method much faster for gathering large quantities for end-game recipes.
Essential Kyanite Crafting Recipes
Kyanite serves as a primary ingredient for the most advanced upgrades in the game. You'll need it to unlock the deepest tiers of exploration and complete your escape.
- Prawn Suit Jump Jet Upgrade: Requires 2 kyanite, 5 nickel, 5 titanium, and 1 lithium.
- Prawn Suit Depth Module MK2: Requires 1 kyanite, 1 plasteel ingot, and 1 ruby.
- Cyclops Depth Module MK3: Requires 1 kyanite, 1 plasteel ingot, and 5 nickel.
- Prawn Suit Thermal Reactor: Requires 2 kyanite, 2 polyaniline, and 1 wiring kit.
- Blue Tablet: Requires 2 ion cubes and 1 kyanite, needed to unlock alien containment facilities and disable the quarantine enforcement platform.
Common Mistakes to Avoid
Players often lose hours of progress or expensive vehicles by underestimating the environmental hazards of the lava zones. Avoid these common pitfalls to keep your expedition running smoothly.
- Forgetting Thermal Protection: Stepping out of your Prawn Suit directly onto hot stone or lava in the ILZ causes rapid damage. Always stay inside your vehicle or step only on cold grey stone.
- Ignoring Energy Management: Lava Larva attach to your Cyclops and Prawn Suit in these biomes, draining your power cells rapidly. Bring an ion power cell or a thermal reactor module to keep your systems running.
- Under-collecting: Don't just grab two pieces for a single upgrade. Collect at least 15 to 20 pieces in one trip so you don't have to make repeated hazardous journeys back down to the lava lakes.
Frequently Asked Questions
Can I find kyanite outside the lava zones?
No. While older game versions allowed rare spawns in shallower biomes like the Blood Kelp Zone, current updates restrict all kyanite spawns strictly to the Inactive Lava Zone and Lava Lakes.
Do I need a Prawn Suit to get kyanite?
You can pick up loose kyanite by hand without a Prawn Suit if you can swim deep enough and manage your oxygen. However, you cannot mine large resource deposits without the Prawn Suit Drill Arm.
How do I survive the heat in the Lava Lakes?
Keep your vehicles moving, use decoys if the Sea Dragon attacks, and equip a thermal reactor module so your Prawn Suit recharges automatically from the ambient heat of the magma.
How many total kyanite pieces do I need to beat the game?
You generally need around 12 to 15 pieces total to craft all necessary depth modules, vehicle upgrades, and alien tablets required for the final story sequence.
