pienuus
Pienuus is a fictional mineral described in speculative fiction and tabletop role-playing settings. In these works, pienuus is a rare, phosphatesilicate mineral renowned for its vivid bioluminescence and its unusual energy storage properties. When subjected to mechanical stress or rapid temperature change, pienuus crystals are said to emit a pulse of light and release stored energy, phenomena that authors use as a plot device or as a power source for miniature reactors in game mechanics.
The name pienuus is presented within the fiction as derived from an ancient or alien language, with
Pienuus crystals are depicted as translucent to iridescent, often hexagonal prismatic forms, with a Mohs hardness
Within stories and games, pienuus serves as an energy medium, a component in luminescent jewelry, and a