feorr

Feorr is a fictional mineral widely used in fantasy settings and role-playing games. It is commonly described as a rare crystalline substance formed in subglacial environments or in deep hydrothermal veins. The term feorr appears in in-universe languages and historical texts within these worlds, and has been adopted by authors and game designers as the standard name for the mineral itself.

Properties: Feorr crystals are typically blue-black or violet-tinged, with a vitreous to adamantine luster. They are said to rank around Mohs 7–7.5 in hardness and to exhibit mild iridescence. Some depictions assign feorr the ability to conduct electricity or respond magnetically, though the exact physical properties vary between settings.

Occurrence and geology: In most sources, feorr forms in high-pressure, low-temperature conditions close to subglacial or ice-influenced environments, or in deep crustal veins associated with igneous intrusions. It is often found alongside magnetite, hematite, and other iron-bearing minerals.

Extraction and processing: Mining involves specialized cold-weather operations or deep underground tunneling. Refined feorr powder or ingots are produced for use in high-performance alloys, energy storage components, or enchanted devices.

Uses and cultural significance: In-world, feorr is valued for stability and energy density, making it a coveted material for runes, relics, and starship components in certain settings. Markets treat it as a scarce, high-value commodity with regional trade networks and regulation.

See also: mineralogy in fantasy settings, magical alloys, and quarrying in fictional worlds.