Felmet

Felmet is a fictional mineral described in speculative geology and science fiction settings. It is typically portrayed as a rare, durable crystal with luminescent properties and exceptional stability under high temperature and pressure, features that make it a popular plot device in technology-forward narratives and games.

Etymology and discovery in common tellings trace the name to the Felmont region, with early field notes credited to a hypothetical geologist character. Across sources, the mineral’s origin is tied to metamorphic or metasomatic processes in crustal rocks, though exact formation scenarios vary by story and game lore.

Physical properties attributed to felmet vary by depiction but share several core traits. Crystals are often described as prismatic, with a vitreous to metallic luster. Color ranges from emerald green to deep blue, frequently displaying a faint internal glow under ultraviolet light. Reported hardness sits around the mid-to-upper range on the Mohs scale, and felmet is consistently noted for high thermal stability and effective electrical insulation. In some versions, it is also described as having piezoelectric or luminescent capabilities.

Occurrence and geology in fictional contexts place felmet in shear zones within metamorphosed basaltic or ultramafic belts, formed under specific pressure-temperature conditions or created by impact-related shock metamorphism. Crystals are usually small but may be faceted for use as gems within story-world economies and ornamentation.

Uses and cultural significance often center on felmet’s imagined properties. It is depicted as a material for energy storage devices, high-temperature composites, sensitive sensors, and luxury jewelry. Its rarity and extraction difficulty drive economic and political dynamics in the narratives where it appears.