Kyanite (Subnautica)

Kyanite is a raw material that appears as an angular blue gemstone, clustered together in a large crystalline formation. It can only be found as a large resource deposit in the Inactive Lava Zone and more sparingly in the Active Lava Zone, making it difficult to mine.

Trivia

 * Kyanite is implied to be involved in Precursor operations because of a cropped crafting tree shown on Trello.
 * Considering this, along with its properties as a heat-resistant material, this probably makes Kyanite part of the recipe for the metal alloys that the Precursor Bases are made off.