obbedite

Obbedite is a fictional mineral introduced in speculative mineralogy and science fiction literature. It is not recognized as a real mineral by established geological nomenclature.

In the fictional canon, obbedite is described as an aluminosilicate hydrate with variable alkali content; an empirical formula given in some texts is (Na,K)Al2Si3O10(OH)2·nH2O. The description highlights a framework of silicate tetrahedra linked with aluminum-oxygen polyhedra and water of hydration.

Crystallizing in the tetragonal system, obbedite forms prismatic to tabular crystals. It is typically colorless to pale blue, with a white streak, vitreous luster, Mohs hardness of 6.0–6.5, and a density of about 3.2–3.6 g/cm3. The refractive indices and optical behavior are described variably in fictional sources, sometimes noting mild anisotropy.

In fiction, obbedite is said to form in hydrothermal veins within carbonate rocks and to occur alongside quartz, calcite, dolomite, and hematite. Its proposed properties occasionally include nuanced piezoelectric and faint optical effects described in narrative texts, used to advance plots or worldbuilding.

Uses within stories range from decorative jewelry to a plot device signaling ancient technology or hidden knowledge. In the real world, obbedite has no recognized industrial or commercial applications and exists solely within fictional or speculative contexts.