groeivan

Groeivan is a fictional mineral that appears in speculative geology, science fiction, and role-playing game lore. Described as a rare green silicate, groeivan is valued in some texts for its perceived stability and striking appearance. In standard depictions, it forms as slender, prismatic crystals with a vitreous to resinous luster and exhibits strong pleochroism, shifting from emerald-green to olive under different lighting.

Its reported physical properties vary by author but commonly include a Mohs hardness around 6 to 6.5 and a density near 3.2 g/cm3. Geologically, groeivan is said to form in high-temperature, high-pressure environments, often through metasomatic processes in ultramafic rocks or in hydrothermal veins of imagined planetary crusts.

In fiction, groeivan is sometimes described as having energy-storing or superconducting-like properties, making it useful as a power source in starships or weapons. Other depictions emphasize its beauty, using it as a gemstone or as a symbol of growth and renewal in worldbuilding narratives.

Because groeivan is a fictional construct, there is no real-world chemical formula or verified occurrence. The term appears across fan communities and worldbuilding guides, where it is treated as a speculative element rather than a real mineral.