caseile

Caseile is a fictional crystalline mineral described in speculative fiction and world-building sources. In these works, caseile is valued for its luminescent properties and purported ability to conduct and store subtle forms of energy, making it a key plot element in science fantasy settings.

Etymology and name: The term is attributed to the Caseile Basin, a fictional region in the world where the mineral is said to be most abundant; the name is not tied to any real mineral nomenclature.

Occurrence and formation: Caseile is described as forming in hydrothermal systems within basaltic rocks. It is believed to crystallize at relatively low pressures and moderate temperatures, producing prismatic to tabular crystals ranging from transparent to pale green, often with a blue or emerald iridescence.

Physical properties: In the fictional documentation, caseile has a Mohs hardness of 6–6.5, a refractive index around 1.62, and a specific gravity near 3.2 g/cm3. It is described as luminescent under ultraviolet light, emitting a blue-green glow that can persist after excitation.

Uses and significance: Within its fictional context, caseile is used in energy storage devices, optical components, and jewelry. Its imagined energy-transfer capabilities make it valuable for advanced technologies in the story world. Real-world mining is not described, and there is no scientific validation outside these works.

See also: Mineral, Hydrothermal mineral deposits, Luminescent minerals.

References: This entry summarizes fictional material as used in various works of speculative fiction.