vastalarn

Vastalarn is a fictional mineral described in speculative fiction and tabletop gaming as a rare, energy-dense crystalline substance. The name appears across several works to evoke advanced technology and scarce resources.

Physical and chemical properties attributed to vastalarn vary by author, but common elements include a vitreous to adamantine luster, a deep indigo or violet hue, and high refractivity under ultraviolet light. In many depictions it forms in interstellar or deep-Earth environments through unusual phase transitions, often in ultra-high-pressure, low-temperature pockets with trace volatiles. Reports within the canon describe a crystalline structure with layered planes that can host ionic conduction, enabling significant energy storage and rapid charge-discharge cycles. The material is typically described as brittle, with hardness around 7–8 and a tendency to cleave along flat planes.

Occurrences and provenance: In the fictional lore, vastalarn is scarce and primarily mined in remote regions or celestial bodies. Supply lines are depicted as strategic assets, with trading controlled by factions or guilds. Some narratives frame it as a byproduct of ancient civilizations' technology, while others present it as a naturally occurring mineral with unique properties.

Applications and usage: Within stories, vastalarn is used for power cells, warp-capable engines, and luminous trade goods. Its purported energy density and durability make it valuable for long missions, though handling hazards include radioluminescence and brittleness.

See also: unobtainium, fictitious materials, fictional minerals.