kohaldus

Kohaldus is a mineral described in the gemological lore of the fictional world of Arathia. It is prized for its color-dispersing properties and high brilliance. The mineral occurs in metamorphosed pegmatites and hydrothermal veins, typically in small prismatic crystals or nodules. When viewed under different lighting, Kohaldus shows a pleochroic range from deep blue to green, with a coppery iridescence at edge angles. It has a vitreous to resinous luster and a hardness around 6.5 to 7 on the Mohs scale. The refractive index is high, contributing to its notable brightness in cut shapes.

Composition and classification: Kohaldus is described in its lore as a complex silicate with trace elements of cobalt and titanium, though no single public formula exists across all texts. It is often classified among rare silicates with opaque to translucent appearances.

Occurrence and mining: In the Arathian records, Kohaldus forms in late-stage crystallization of pegmatites and in vein networks within metamorphic rocks. It is relatively rare and usually found with quartz, feldspar, and mica.

Etymology and cultural significance: The name derives from the ancient Arathian region of Kohal, meaning shining stone. In fantasy literature and role-playing settings, Kohaldus is associated with clarity and protection, and is frequently used in jewelry, seals, and artifact components.

See also: silicate minerals; iridescent gemstones; pegmatite.