Acid.

Ouranite, Rare

Can only be found in the stomach bile or acid sacs of certain creatures throughout Alaraes. It naturally looks like a vibrantly green gelatinous blob with an acrid, sulphury smell, and gives a stinging burn when touched. After refining, it has a sickly green hue and the acrid smell becomes more diminished. This ouranite is rarely harvested due to the difficulty in obtaining it.