Searching for lithium in Subnautica 2: Guide
Access to the lava biome is closed if your hero is not prepared, it is very hot there. To explore this area calmly, you need to unlock the adaptation «Heat Resistance». To do this, find the black box Wander, near it there will be a creature "crested angel". Clear it of plants, and then work with it to obtain the needed adaptation.

If you have received sun protection, head away from the rescue capsule, orient yourself using the compass in direction 120, this is between south and southeast. You need to swim about 250 meters, after that an indicator of elevated water temperature will appear, which means you are already at the place.
In the biome itself, look for caves by these signs:
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glowing green grass on the ground and walls
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mushrooms with thick blue-green stems and brown caps
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large lithium deposits inside rock tunnels

To break rocks, use the sonic resonator. Unlike titanium or copper, which give five resources at once, a lithium node drops only 1 or 2 units. If you have built a station for finding different minerals, keep in mind that it finds resources only within a radius of up to 300 meters. More interesting lifehacks in our Shopi Game blog.