Anullua

Anullua is a fictional mineral commonly referenced in science fiction and speculative literature. The term is often used to denote a rare crystalline material with concentric ring-like inclusions and with properties that are unusual when interacted with electromagnetic radiation. The name draws on the word annulus, reflecting the ringed pattern described in many depictions.

Origins and occurrence of anullua vary by story. In several settings it is portrayed as extraterrestrial, found in meteorites or in the crust of distant rocky worlds. It is sometimes said to form under extreme high-temperature conditions and low oxygen, producing a layered or laminated crystal structure that reveals visible annular patterns when sliced.

Physical and optical properties of anullua also differ across works, but common traits include a high refractive index, a metallic or vitreous luster, and a hardness sufficient for fictional industrial use. Its reputed ability to absorb, store, or redirect electromagnetic energy makes it a sought-after material for shields, sensors, or power storage in various narratives.

In real-world terms, anullua remains a fictional construct with no standardized properties. Because different authors and media treat it differently, there is no canonical specification. It is typically employed as a narrative device to explore ideas about exotic materials, advanced technology, and their potential impact on society and exploration.