Tyminë

Tyminë is a rare crystalline mineral described in the technical and arcane literature of the fantasy world of Thalassia. It is valued for its resilience and its capacity to interact with energy fields, enabling practical engineering and spellcraft.

Physical characteristics: Tyminë crystals range from transparent to pale iridescent, often displaying a blue-green hue and faint luminescence in low light. It has a hardness akin to quartz and a high refractive index, giving vividly faceted cuts. Chemically, tyminë is largely inert, though it can form transient complexes with activated catalysts and sigils.

Occurrence and formation: Tyminë forms in deep hydrothermal veins within metamorphic rock near geothermal zones and is mined primarily in the northern highlands of Thalassia. Radiometric dating places some deposits in active seismic belts, suggesting episodic formation tied to tectonic activity.

Uses and value: In industry, tyminë serves as a conductor for energy, a core for arcane devices, and a material for wards and enchantments. In jewelry, it is prized for color, glow, and stability under enchantment. Synthetic tyminë exists but authenticity is a concern for collectors.

Economy and culture: Tyminë trade supports mining towns and regional markets. Extraction is regulated to prevent ecological harm, and stewardship programs have been established. The mineral also features in myths as a stone of foresight in some cultures.