Sarnaseid

Sarnaseid is a fictional mineral that appears in speculative geology and science fiction worldbuilding. It is described as a rare blue-green silicate mineral with unusual physical and quantum properties, often invoked for its purported ability to enable efficient energy transfer. The name is presented in fictional contexts as a constructed term, sometimes incorporating linguistic roots from invented languages and a mineral-name suffix.

Properties commonly attributed to sarnaseid include a vitreous to pearly luster, a color range from teal to deep sapphire, and a Mohs hardness of about 5–6. In various in-fiction sources, its density is placed around 3.2–3.6 g/cm3 and its refractive index near 1.65, with moderate pleochroism. Crystallography is described as hexagonal or monoclinic, and some depictions attribute luminescent or temperature-dependent spectral behavior to sarnaseid.

Occurrence and formation are described in fictional contexts as arising in ultramafic to metamorphic rocks subjected to high-temperature hydrothermal processes, often in alpine-to-subduction-zone settings. It is said to form from reactions between silicate minerals and volatile-rich fluids, and in some stories it can pseudomorph other minerals.

Uses and cultural role in fiction typically center on energy storage, catalysis, or as a gemstone with technological or magical properties. Sarnaseid is often portrayed as highly sought after in narratives about mineral wealth or advanced technologies. Real-world presence: there are no verified natural occurrences of sarnaseid outside fictional or speculative writings, so claims of authentic samples belong to fictional lore rather than official mineralogy.

Discovery and etymology in most sources are treated as part of the fictional worldbuilding, with no official mineral-name status in scientific taxonomy.