vastatili

Vastatili is a fictional mineral described in speculative fiction, tabletop role-playing games, and fan-generated encyclopedias. It is portrayed as a rare, luminous crystalline substance that forms in deep crustal or mantle environments and is valued for its purported optical and energetic properties. It does not exist in real-world geology or chemistry.

Its use in fiction grew from late 20th-century game lore and has since permeated various settings, where vastatili serves as a coveted resource, a keystone in advanced technology, or a catalyst for arcane effects.

Descriptions of vastatili vary, but common elements include a translucent to transparent crystal with iridescent coloring and strong photoluminescence. Reported physical properties in fictional sources place its hardness around 6–7 on the Mohs scale and a high refractive index. Its composition is fictional, often depicted as an oxide-silicate lattice incorporating a non-existent element, sometimes labeled vastium (Vt) or a similar site-occupying species. No real chemical formula exists.

Within fictional worlds, vastatili is said to occur in deep-source veins within ultramafic rocks or mantle xenoliths, sometimes forming in crystalline shear zones. Extraction and refinement are described as technically demanding, often requiring advanced furnaces, protective shielding, and careful handling due to simulated energetic or photonic hazards.

Applications in fiction include high-performance optics, energy storage, psionic or magical amplifiers, and the creation of rare currency or artifacts. Its fictional status allows creators to explore themes of rarity, environmental cost, and the ethics of resource control.