Sagusvahe

Sagusvahe is a fictional mineral featured in worldbuilding and speculative fiction. The term refers to a bioluminescent silicate mineral that, in many stories, forms in hydrothermal veins within basaltic rock. The name is constructed from imagined roots sagu- and vahe, with no direct real-world etymology.

Physical properties include a hardness around 6 on the Mohs scale and a density near 3.2 g/cm3. Sagusvahe is notable for a stable pale-blue to emerald glow that appears under mild electric currents or warm temperatures, a trait used in fictional lighting and energy-storage concepts. In most settings, its precise chemical composition is described as a silicate matrix with trace rare earth elements.

Occurrence and extraction: Deposits are depicted on remote volcanic islands and in subduction zones. Mining is portrayed as hazardous due to high temperatures and magnetic interactions with equipment. Environmental and local-regulation themes appear in several narratives to explore responsible resource management.

Uses and cultural significance: Sagusvahe often appears in jewelry and ceremonial artifacts because of its glow, and in some stories serves as a portable energy source or a unit of exchange within micro-states. The mineral’s fictional status distinguishes it from any real mineral.