Glimspar

Glimspar is a magic-imbued mineral that is found in especially high concentrations at The Glimmering Archiourano. It is the reason why the islands float in the air, why the vegetation on them is an odd color, and why the clouds swirling around them glitter.
It has been discovered that when glimspar is put in a furnace instead of coal, it burns for many times longer and hotter, emitting an iridescent smoke. Like the islands it originates from, it can hold vessels like Airships aloft. It is highly sought after in the Eight States of Chronan that base their might and prowess on steam-based technology, but most of the mines are governed by The Dragon Lords of the Archiourano. Sky Pirates abuse this dependence by frequently raiding airships and Glimspar mines.