leijuva

Leijuva is a fictional mineral species used in speculative geology and worldbuilding contexts. In the narratives that feature it, leijuva is prized for its unusual optical properties, including a pale green to blue-green color and a strong, self-generated luminescence under ultraviolet light. The mineral is treated as rare and valuable, with both ornamental and theoretical technological appeal.

Etymology and origin stories in the fiction commonly tie the name to a discoverer or a cultural term from a fictional language. In many accounts, leijuva is said to form in deep, heat- and pressure‑affected rock environments and to crystallize from hydrothermal fluids that interact with metallic and silicate-rich substrates. Some enthusiasts attribute its glow to trace elements such as rare-earth ions, though the exact composition is intentionally variable across different worldbuilding sources.

Physical properties described in the lore include a monoclinic crystal habit, a Mohs hardness in the mid-single digits, and a glassy (vitreous) to silky luster. Specimens are typically small but can be highly translucent, with color ranging from pale green to azure. Under ultraviolet light, they exhibit a pronounced blue or green fluorescence, and some depictions imply a faint internal sheen that shifts with viewing angle.

Distribution, mining, and trade are usually restricted in these settings. Leijuva is described as rare and geographically clustered, often found in specialized hydrothermal veins or metamorphic zones. Because it is a fictional mineral, practical handling, market value, and regulatory frameworks vary by story and author.