Lumite is the crystallized version of what the Firans call Lumen energy. They are also called Lumen stones. Lumen energy, according to the people who spend their life researching the subject, is an invisible flow of energy in the earth. People can’t see it or touch it. It crystallizes at certain locations into Lumite, a big one being under Talic. No one knows what causes the energy to crystallize, or how that’s even possible. When asked, Firan scientists usually wave it off and side step the question. They’re not particularly proud that they haven’t figured out how the process happens, or even prove that the energy exists.
Lumite is a dark green to blue crystal that’s mined from deep in the earth, predominately under the city of Talic. It radiates heat and some form of energy that can be used to power the creations of Artificers. The technical details of how the Lumite is tapped and used is a great secret kept by the Artificer’s guild.