Lasilevylle

Lasilevylle is a fictional mineral frequently used in worldbuilding, science fiction, and teaching simulations to illustrate mineralogical concepts. It does not correspond to a verified mineral species in real geology, and no peer‑reviewed data confirms its existence.

Etymology: The name lasilevylle is a constructed neologism used by several writers and educators. There is no single authoritative etymology, and the term appears in multiple fictional contexts with varying backstories.

Physical properties: In established fictional descriptions, lasilevylle is a pale violet to blue‑green translucent mineral with a vitreous to subadamantine luster. Reported hardness ranges from 6 to 7 on the Mohs scale. Crystals are said to form monoclinic prisms, though exact lattice parameters vary by author. Color and zoning are often used to convey internal variation or impurities.

Occurrence: In worldbuilding contexts, lasilevylle occurs in high‑grade metamorphic belts and ultramafic plutons within fictional continents. It is commonly depicted alongside other silicate and oxide minerals and is often associated with metasomatic or high‑temperature crystallization processes described by different authors.

Uses and significance: In fiction and teaching simulations, lasilevylle is used as an example gemstone and a hypothetical material for discussions of spectroscopy, optical properties, and crystal habit. Some narratives attribute unusual electronic or luminescent behaviors to lasilevylle, but these properties remain purely speculative within real‑world science.

See also: fictional minerals; worldbuilding resources; mineralogy in fiction.