viljellyn

Viljellyn is a fictional mineral that appears in speculative fiction, science fiction, and tabletop role-playing settings. Descriptions commonly portray viljellyn as a dense, metallic silicate with a distinctive blue-green glow under ultraviolet light.

In various works its properties vary, but it is often depicted as highly conductive and mildly magnetic, with a hardness comparable to common silicate minerals. The material is typically described as rare and valuable in-universe, and its appearance can range from steel-gray to iridescent blue-black.

Occurrence and geology: Viljellyn is said to form in high-temperature hydrothermal veins and pegmatites in the fictional Viljellan Highlands, frequently found with quartz, magnetite, and chrysocolla. Its crystals are described as prismatic or tabular, though depictions differ between authors and game systems.

Usage and significance: In stories and games, viljellyn serves as an energy-conducting resource for reactors and engines, as well as a material for jewelry and ritual devices. Some settings credit it with arcane or pseudo-technological properties, enabling unique equipment or devices.

Etymology and naming: The term viljellyn is a constructed name used by various creators; there is no single canonical origin across works, and its meaning or associations can vary by setting.

See also: Fictional minerals; Geology in speculative fiction. Notes: Because viljellyn is a fictional concept, specific details are source-dependent and not aligned with real-world mineralogy.