Kyanite is a raw material that appears as an angular blue gemstone, and can be clustered together in a large crystalline formation.

Uses in Crafting


Spoiler alert: The following section contains story related material.

Ion CrystalKyaniteKyaniteArrow-right (1)FabricatorArrow-right (1)Blue Tablet

Plasteel IngotCrystalline Sulfur×4Kyanite×4Ion Power CellIon Power CellArrow-right (1)Rocket BaseArrow-right (1)Neptune Escape Rocket Stage 2

Vehicle Upgrade Console

KyaniteKyanitePolyanilinePolyanilineWiring KitArrow-right (1)Vehicle Upgrade ConsoleArrow-right (1)Exosuit Thermal Reactor

Cyclops Upgrade Console

PolyanilinePolyanilineKyanite×4Wiring KitArrow-right (1)Cyclops Upgrade ConsoleArrow-right (1)Cyclops Thermal Reactor Module

Modification Station

Cyclops Depth Module MK2Plasteel IngotKyaniteKyaniteKyaniteArrow-right (1)Modification StationArrow-right (1)Cyclops Depth Module MK3

Prawn Suit Pressure Compensator Mark 1Titanium×5LithiumLithiumKyaniteKyaniteKyaniteArrow-right (1)Modification StationArrow-right (1)Prawn Suit Depth Module MK2

Data Bank Entry

Kyanite is a blue silicate mineral which forms under high temperature, high pressure conditions. It is resistant to heat up to 1100 degrees Celsius, and is commonly used as an electrical insulator in thermal power plants.

Assessment: Essential for vehicle-mounted thermal reactors



  • There were once single pieces of Kyanite that could be found in deep Biomes, such as the Blood Kelp Zone or the Dunes as of the Precursor Update.
  • Kyanite is one of the few resources in Subnautica that is not guaranteed to eject smaller pieces when drilling chunks from a large node. This is not a bug.
    • There is a 0.000000471431432% chance for a large Kyanite deposit to yield 22 Kyanite pieces.