Natulig

Natulig is a fictional mineral or material that appears in various works of science fiction and fantasy. In many depictions, natulig is a naturally occurring luminescent crystal or polymeric compound with unusually high photoluminescent efficiency and energy storage capacity. It is often described as forming in deep geological veins where mineralization intersects with geothermal or radiant energy sources, producing crystals that glow with a steady, cool light after a brief charge from daylight or artificial illumination. The color range is typically described as colorless to pale blue, though individual writers vary in their specifics.

In worldbuilding and storytelling, natulig is valued for its potential as a lightweight, long-lasting lighting source and as a form of ambient energy storage. Devices utilizing natulig crystals may discharge slowly to illuminate spaces for extended periods or be integrated into power systems for emergency signaling. Because natulig is portrayed as rare, its mining and handling can drive political intrigue and conflict, with plots often addressing ethical sourcing, environmental safeguards, and the economics of a natulig trade.

There is no real-world substance universally recognized as natulig, and the term is not standardized across works. In some media or commercial contexts, natulig may also appear as a fictional technology brand or plot device without a consistent set of properties. When encountered outside fiction, natulig generally refers to invented material content rather than an actual substance, reflecting its role as a worldbuilding or narrative construct.