City lore 9

Here we have one of the scientists working on pulling out reagents from natural elements. It’s all in the planning stages, but I imagine that in the city there are crystals growing. More so the closer you get to the volcano mouth - these can get ground to variously coarse dust with different aspects.
There are also a life form like trees, but they look like arrows. These arrows get harvested and are used in the processes of starting reactions.