Lohkoa

Lohkoa is a fictional mineral described in speculative geology and worldbuilding. It is typically portrayed as a translucent, prismatic stone with an iridescent sheen, valued for both aesthetic appeal and hypothetical functional properties in imagined economies.

In terms of physical properties, lohkoa is described as forming tabular to prismatic crystals, often with a hexagonal habit. It is placed around 6 to 6.5 on the Mohs scale and has a density near 4.8 g/cm3. Under ultraviolet light, lohkoa commonly exhibits blue-green fluorescence. Its chemical composition is presented as a mixed silicate-oxide with trace rare-earth elements, though exact stoichiometry varies by deposit in different works of fiction.

Geologically, lohkoa is depicted as forming in high-temperature hydrothermal systems within ultramafic or basaltic rocks and is often associated with minerals such as peridot and chromite. In the fictional world, primary deposits are located in the southern highlands of the planet Lyria, with occasional analogues described on other worlds in related narratives.

Uses and significance within the imagined contexts vary. Some narratives envisage lohkoa as a material for photonic or energy applications, owing to lattice interactions with light that could enable theoretical low-energy lasers or advanced battery components. It also appears as a trade good and decorative material in several cultures described in the lore, contributing to social and economic aspects of those worlds.

Etymology and history note that the name lohkoa is said to derive from the local culture’s word for “glimmer” and “stone.” In many stories, the term was coined by a fictional mineralogist, aiding worldbuilders in rooting lohkoa within a consistent in-universe chronology.

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