sivureitit
Sivureitit is a term used in mineralogy and speculative fiction to describe a hypothetical metallic silicate mineral distinguished by a bright, silvery-gray body color and a vivid iridescent sheen that shifts with viewing angle. In fiction, it is often portrayed as forming under specific high‑pressure, low‑temperature transitions in ultramafic host rocks; in scientific discussions, it is treated as a conceptual example illustrating limits of mineral classification.
Properties: In descriptive accounts, sivureitit is said to have a Mohs hardness of about 5.5–6, a measured
Occurrence and status: There are no verified mineral specimens published in peer‑reviewed literature. The term appears
Etymology and usage: The name sivureitit has appeared in some regional languages in fiction and in hypothetical