svtlá

Svtlé is a fictional luminescent mineral described in speculative literature and worldbuilding contexts. It is valued for its intrinsic glow and potential use in photonic and energy storage applications within the imagined ecosystems of the Solion Archipelago.

Physical properties: svtlé crystals are translucent and glassy, often forming tabular prisms up to several centimeters. It has a vitreous luster and displays stable luminescence under UV light, with phosphorescent persistence. The material is largely composed of a silicon-oxygen framework with trace aluminate and ferrous impurities, giving a characteristic blue-green emission. Mohs hardness is reported around 6, making it relatively robust for handling.

Formation and occurrence: In the fiction, svtlé forms in hydrothermal veins within basaltic rocks, where silica-rich fluids cool under moderate pressures. Deposits are described as irregular, concentrated in fault zones of volcanic islands, with high-quality crystals rare.

Applications and cultural role: Within the fictional setting, svtlé is explored for energy storage, illumination, and optical encoding. Its phosphorescent properties allow low-energy lighting, while its crystal lattice can host color centers for information transfer.

Discovery and regulation: The earliest references date to ancient maps of the Solion Sea; modern mining is tightly regulated in the story's world due to environmental concerns and to protect rare crystal occurrences.