Crystalline Sulfur (Subnautica)

Crystalline Sulfur is a raw material that functions as an oxidant and reducing agent. They appear as rough, irregular crystals that are primarily yellow with faint stripes of white throughout. This material can be found in the Lava Lakes, Inactive Lava Zone, and in the Lost River under the green brine.
Data Bank Entry
Sulfur is a highly reactive, non-metallic element, usually found in abundance underground. Common applications include production of acidic compounds, and combustibles.
Assessment: Essential for advanced fabrication
Biomes
- Inactive Lava Zone
- Inactive Lava Chamber
- Inactive Lava Zone Corridor
- Lava Castle
- Lava Lakes
- Lost River
- Ghost Canyon
- Ghost Forest
- Junction
- Mountains Corridor
Uses in Crafting
Cyclops Upgrade Fabricator
| Item | Quantity |
|---|---|
| Aerogel | 1 |
| Crystalline Sulfur | 1 |
Result: Cyclops Fire Suppression System
Vehicle Upgrade Console
| Item | Quantity |
|---|---|
| Nickel Ore | 1 |
| Titanium | 5 |
| Lithium | 1 |
| Crystalline Sulfur | 1 |
Result: Prawn Suit Jump Jet Upgrade
Spoiler alert: The following section contains story related material.
Neptune Fuel Reserve
| Item | Quantity |
|---|---|
| Plasteel Ingot | 4 |
| Kyanite | 4 |
| Ion Power Cell | 1 |
| Crystalline Sulfur | 1 |
Result: Neptune Escape Rocket Stage 2
Gallery
Crystalline Sulfur in the Lost River, under a shallow brine pool
Crystalline Sulfur in the Inactive Lava Zone
Crystalline Sulfur in-game