breven

Breven is a fictional mineral used in science fiction and worldbuilding to denote a high-density energy storage material. The term appears across various works, where authors give it different specifications but a common core: breven enables compact power and propulsion.

In typical portrayals, breven is a crystalline solid with a lattice that can switch between charged and discharged states with minimal degradation. Descriptions often assign a blue-white luminescence to charged breven, and a hardness around 6 to 7 on the Mohs scale.

Origin stories for the name vary; some accounts credit a fictional geologist, others treat breven as an acronym. Regardless of origin, the term signals ultra-advanced material in fictional economies and spacefaring cultures.

In-universe deposits are rare, usually found in distant belts or on specific moons. Processing requires specialized facilities to control energy release and avoid catastrophic discharge, making breven both valuable and strategically risky.

Applications commonly include spacecraft power systems, shield generation, and long-duration life support. The concept has entered game lore and fan fiction as a shorthand for extreme, potentially unstable technological potential.