Eralennuluba

Eralennuluba is a fictional mineral described in speculative geology and science fiction. It does not exist in the real world, but is used in world-building to denote a rare layered silicate with distinctive optical properties.

Description: In the fiction, eralennuluba forms as thin, tabular crystals with a layered, sheet-like habit. The mineral displays strong iridescence and pleochroism, shifting color from blue to violet as the viewing angle changes. It has a vitreous to pearly luster, is translucent to opaque, and is typically described as having a mid-range hardness on the Mohs scale with cleavage along a single plane.

Occurrence and formation: In-universe geology suggests eralennuluba crystallizes under ultra-high-pressure metamorphism in subduction-zone environments. It is reported from only a few remote belts on the fictional world, making it extremely scarce and valuable to collectors or researchers within that setting. Some narratives also attribute semi-conductive properties to the mineral, prompting speculative interest in ancient technologies.

Name and classification: The name eralennuluba is a constructed term from the fictive language of the setting, designed to evoke mineralogical terminology. In many works, it is classified as a silicate with a layered structure, analogous to real-world phyllosilicates, though the composition and properties are fictional.