Soluille

Soluille is a fictional mineral commonly cited in speculative geology and science fiction. The name is typically explained as a combination of sol, the Latin word for sun, and a mineral-sounding suffix, giving it an aura of a crystalline substance tied to solar energy.

In fictional depictions, soluille is described as a rare silicate mineral with intrinsic solar luminescence. Its appearance ranges from colorless to pale amber in daylight, and it may glow gold or emerald under ultraviolet light. The material is usually said to have a vitreous to resinous luster and a hardness in the mid-range on the Mohs scale, making it workable in specialized laboratory or industrial contexts within those works.

Formation and occurrence are portrayed as tied to extreme conditions. Stories commonly place soluille in hydrothermal veins within volcanic or tectonically active regions, or in solar-irradiated metamorphic rocks. Crystals are described as growing in prismatic, tabular forms that can be found in isolated pockets or veined deposits.

Applications and significance in fiction often center on energy-related uses. Soluille is depicted as capable of storing solar energy or converting light directly into usable electrical or luminescent output, enabling portable lighting, signaling, or power systems in speculative settings. Extraction and processing are typically portrayed as challenging, due to the mineral’s rarity, the glow it emits, or its sensitivity to environmental conditions.

See also: luminescent minerals, solar energy materials, speculative mineralogy.