A really cool Apothecary
Slab
A really cool Apothecary. They buy herbs and crystals (or will send out your party to obtain components) and bring them to the top of the building to drop them into the main tanks. then they get distilled down to make potions or components for magic items.
The process is much like a moonshine distillation process to simmer down large quantities of components to make a concentration of magical properties.
In my game I have the green crystals along with the purple flower get processed to the green three sided bottles for basic healing potions.
Then the blue crystals can get distilled down to make ingots for magical items.
The Purple crystals are needed as catalyst for more powerful magic and items and are hard to find.
Have fun!!