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This article is about Uraninite Crystals in Subnautica. Click here for information on this subject in Below Zero.

Uraninite Crystals are a raw material used to create a single component, the Reactor Rod (Subnautica). They can be found both in raw form on the seabed and as a large resource deposit.

Uses in Crafting


Uraninite Crystal.pngUraninite Crystal.pngUraninite Crystal.pngLead.pngTitanium.pngGlass.pngArrow-right (1).pngFabricator.pngArrow-right (1).pngReactor Rod.png

Data Bank Entry

Uraninite is a naturally occurring uranium oxide. Highly radioactive and unstable, its primary use is in the production of uranium reactor rods for nuclear generators.

Assessment: Applications in nuclear power



  • Uraninite Crystals were formerly used to craft an intermediary material called Uranium, at a rate of three Uraninite Crystals to one Uranium. Uranium was removed in the Voice of the Deep update of 2017 to simplify the Reactor Rod recipe.
  • Uraninite Crystals were previously part of the recipes for the Cyclops Shield Generator and Prawn Suit Thermal Reactor. In both cases the Uraninite in these recipes was replaced with Polyaniline.
  • When picked up, the player's Geiger counter will go off briefly. This is purely a cosmetic pickup sound and can never result in damage.
  • The chemical formula for Uraninite Crystals (U3O8) is that of triuranium octoxide, a form very common in "yellowcake" powder. This is actually a relatively un-radioactive and extremely stable form of uranium prior to enrichment, as it is over 99% uranium-238, an isotope with a half-life of 4 billion years.