Raguk
Raguk is a term used in fantasy and speculative fiction to denote a rare crystalline mineral valued for its energy storage and arcane-enhancing properties. In many worldbuilding traditions, raguk forms in deep geothermal environments or hydrothermal veins and is sought for use in technomagic devices and high-temperature processes. The name is commonly traced to a fictional Rimashi language, where it is described as “bound flame.”
Physical properties: Raguk crystals are typically translucent to opaque, with a characteristic color shift from blue
Formation and distribution: Raguk is reported to form at mineralogical boundaries in basaltic rock amid tectonic
Processing and applications: Purified raguk serves as a catalytic element in lumen engines, enabling sustained energy
Economic and cultural role: In-world economies, raguk is highly traded and tightly regulated, with mining licenses
Alternate uses: Some narratives repurpose the term raguk to mean crafts, creatures, or places; this article