Hamufelht

Hamufelht is a fictional mineral term used in worldbuilding and speculative geology. It denotes a hydrated aluminum silicate that occurs as pale-green to pale-amber crystals in hydrothermal veins. In the described worldbuilding schema, its approximate formula is (Al3+)(Si4O10)(OH)2·nH2O, with minor Fe2+ and Mg2+ substituting for aluminum in some crystals. The name is constructed from imagined linguistic roots hamu and felht.

Hamufelht crystallizes in the monoclinic system and forms prismatic to fibrous crystals. It has a Mohs hardness around 6, vitreous to pearly luster, white streak, and a measured density near 2.9 g/cm3. Cleavage is imperfect, and specimens are typically translucent to transparent. In reflected-light microscopy it shows moderate pleochroism.

Geographically, hamufelht is described as occurring in hydrothermal veins within basaltic or andesitic rocks, typically where silica-rich fluids alter feldspathic precursors under low-to-moderate temperatures. It commonly occurs with quartz, clays, and other silicates. Its formation is attributed to metasomatic alteration and late-stage hydrothermal activity.

In worldbuilding contexts, hamufelht serves as a tracer mineral for hydrothermal systems and as a subject of mineralogical study within fictional locales. Because of its complex composition, it is often cited in discussions about mineral classification and nomenclature in speculative geology.

Note: Hamufelht is a fictional mineral and does not exist in real geology.