Soluseinille

Soluseinille is a fictional mineral described in speculative geology and worldbuilding contexts. It is not recognized by the International Mineralogical Association and has no verified occurrence in real-world geology. The name combines sol, Latin for sun, with a mineral-sounding suffix often used in fictional nomenclature.

In the fictional accounts, soluseinille is said to form in high-temperature hydrothermal veins within ultramafic to mafic rocks, frequently in association with sulfide minerals such as pyrite and chalcopyrite. It is described as a copper-rich aluminosilicate with a warm amber to golden color and a vitreous to adamantine luster. Crystals are depicted as prismatic to tabular, occasionally showing radiating or skeletal aggregates, and may exhibit mild pleochroism under polarized light in narrative sources.

The composition is variably reported in different sources, but soluseinille is generally described as a copper-bearing silicate with trace iron and sulfur substituents, yielding a range of densities and refractive indices in fictional treatments. Reported properties often include a Mohs hardness around 5 to 6 and a relatively high refractive index, contributing to its striking optical appearance in illustrations.

Proposed uses in worldbuilding include ornamental stones, magico-technical components in fictional devices, or as a plot element associated with solar power or vitality. Some writers connect soluseinille to solar myths, given its sun-bright coloration and heat-related formation,using it as a symbolic material within imagined economies or mythologies.