ovilistones

Ovilistones are a fictional mineral species described in speculative geology and worldbuilding literature. The name derives from the fictional region of origin, Ovilis, used to anchor the material in imagined geology.

Ovilistones occur as nodules and crystals with a vitreous to pearly luster and a color range from pale blue to gray or amber. They are described as silicate-based aggregates with microcrystalline or fibrous textures. Specimens typically show a botryoidal or prismatic habit and a conchoidal to uneven fracture. On the Mohs scale, hardness is usually given as 6–7.

In fictional settings, formation involves silica-rich fluids crystallizing under temperatures and pressures associated with hydrothermal activity or diagenetic processes in volcanic or sedimentary rocks. They are often linked with zeolite-rich assemblages in carbonate or volcanic matrices. Geographically, origins are placed in the hypothetical Ovilis Belt or similar remote provinces in worldbuilding narratives.

Cultural role: Ovilistones are valued as decorative stones for jewelry and sculpture. In some stories, they are thought to stabilize memory or to amplify insight, though such properties are a matter of myth within the fiction.

This entry treats ovilistones as fictional; sources appear in worldbuilding compendia and speculative geology guides within fiction.