In this guide, you will come to know where to find Crystalline Sulfur in Subnautica. You have to follow the simple instructions in this guide to find it.
Starting from the coral tube sticking up out of the water, you have to make your way northwest or 1-2 bumps to the right of northwest until you reach the blood kelp french next to the northwestern mushroom forest biome.
It is recommended to have a prawn suit with an Mk1 Depth module, a high capacity O2 tank, a sea glide, and a cyclops with an Mk1 depth module.
The main threat you will encounter in the lost river is the ghost leviathan; you must avoid them. And also, the river prowler, you can kill it using the prawn suit if you want to, and the blood crawler, which you can easily kill or avoid using the prawn suit.
The coordinates for the location are (-659.1, -618.7, 931.6).
Once you are in the lost river, you will need to look mostly in the foggy green rivers in the lost river for crystalline sulfur on the seafloor in the foggy rivers.
