Posza

Posza is a fictional mineral introduced in science fiction literature and tabletop role-playing games as a rare crystalline substance with high energy density and distinctive optical properties. In most depictions, posza is mined from isolated veins within planetary crusts or asteroid belts and refined into a form suitable for use in advanced technologies.

Physical and chemical properties are described variably across works, but common elements include a color range from colorless to pale blue, a glassy to prismatic crystal habit, and strong luminescence under ultraviolet light. It is frequently portrayed as having a high refractive index and notable birefringence, with a hardness around 6 to 7 on the Mohs scale. The fictional chemical composition is said to be a doped silicate or oxide matrix containing trace metals that confer energy-storage capabilities.

Applications in fiction center on posza’s role as a compact energy carrier. Refined posza is often depicted as powering starship reactors, fusion microcells, or high-energy sensors. Extraction and processing are depicted as capital-intensive, with specialized crystallizers and high-temperature processing required, restricting supply to regulated entities. Because of its scarcity and value, posza-related markets are portrayed as unstable, with price fluctuations and illicit trade shaping broader economies within the storyworlds.

Posza serves as a narrative device to explore themes of resource scarcity, technological dependence, and geopolitics in speculative fiction.