Where to Find Crystalline sulfur in Subnautica: Below Zero
Crystalline sulfur is likeliest in Purple Vents (about 59.6 spawns per new game there). Most modelled spawns lie between -174 m and 20 m (negative is below sea level), and the files pin 2 fixed spots on the map.
Data: Subnautica: Below Zero game files (build of 12 Aug 2025), read and drawn by PinDrop. (c) Unknown Worlds Entertainment. PinDrop is fan-made and not affiliated with Unknown Worlds Entertainment.
Where to find Crystalline sulfur: areas ranked
Top 3 areas by expected spawns per new game, then the share of that area's spawn slots that can hold crystalline sulfur.
- Expected spawns per game
- 80.4
- Fixed pins in the files
- 2
- Depth band (metres)
10%: -174 m · median: -60 m · 90%: 20 m
| Rank | Area | Share of area slots | Chance per eligible slot | Expected per game |
|---|---|---|---|---|
| 1 | Purple Vents | 5.8% | 2.2% | 59.6 |
| 2 | Rocket Area Cave | 100% | 15% | 11.3 |
| 3 | Hot Springs | 100% | 38% | 9.5 |
A model read from the game's code and data (EntitySlot spawner tables, 921,892 baked slots), not verified in a running game; it shows where a resource CAN spawn, not where it is in your save.
How Crystalline sulfur appears
| Name in the game | Form | File id |
|---|---|---|
| Crystalline sulfur | Item you pick up | Sulphur |
The files name no tool for this resource, so none is given here. Outcrop and item forms come from the spawn-table ids (Breakable, Drillable, or the item itself).
Fixed crystalline sulfur pins (2)
Objects the files place at set coordinates. Depth in metres: negative is below sea level. Each row opens that pin on the full map.
| Pin | Area | Depth (m) | Position | Map |
|---|---|---|---|---|
| Crystalline sulfur | Delta Island | +31 | x -234, z -727 | Show on map |
| Crystalline sulfur | Delta Island | +30 | x -234, z -729 | Show on map |
What Crystalline sulfur is used in
6 named recipes in the game files use crystalline sulfur as an ingredient.
Flareneeds 1 · Fabricator, Seatruck Fabricator Module
Gas torpedoneeds 1 · Fabricator, Seamoth upgrades, Seatruck Fabricator Module
Laser cutterneeds 1 · Fabricator, Seatruck Fabricator Module
Prawn suit jump jet upgradeneeds 3 · Fabricator, Seamoth upgrades, Seatruck Fabricator Module
Repair toolneeds 1 · Fabricator, Seatruck Fabricator Module
Seatruck Afterburner Upgradeneeds 2 · Fabricator, Seamoth upgrades, Seatruck Fabricator Module
All recipes are on the crafting page.
About Crystalline sulfur in Subnautica: Below Zero
Crystalline sulfur has 3 areas in the spawn model, led by Purple Vents with about 59.6 expected spawns per new game. In the model 10% of its spawns lie deeper than -174 m and 10% shallower than 20 m, with the median at -60 m (negative is below sea level). The game files also place 2 fixed pins, listed above.
The chance model is built from the game's own spawn tables, so it shows where crystalline sulfur can appear, not where it sits in your save. For the other ores see the resource chance table; blueprints that unlock recipes are on the blueprints page.
A model read from the game's code and data (EntitySlot spawner tables, 921,892 baked slots), not verified in a running game; it shows where a resource CAN spawn, not where it is in your save.