Haldurite

Haldurite is a fictional mineral name used in speculative geology and science fiction to illustrate mineralogical terminology. It is not recognized by the International Mineralogical Association and has no formal, real-world chemical formula or crystal structure in mineral databases.

In fictional depictions, haldurite is described as a dense, often metallic or glassy mineral with a wide range of appearances. Common portrayals give it a hardness on the Mohs scale between about 4 and 6, a metallic or vitreous luster, and colors from steel gray to blue-black. Its streak is usually light gray, and it may be opaque or translucent in larger crystals. Because it is invented for storytelling, the exact composition and crystal habit vary between works.

In terms of occurrence, haldurite is usually shown forming in extreme environments, such as planetary interiors, meteorite matrices, or metasomatic zones with reactive halogen-bearing fluids; these settings are chosen to fit the mineral’s imagined properties in the story. It is sometimes described as ductile or brittle, depending on the narrative, and is occasionally stated to be highly conductive or heat-stable.

Uses and significance in fiction include energy storage, advanced jewelry, or as a plot device signaling rare geology. Despite its frequent appearance in fiction, haldurite has no basis in established mineralogy, and real researchers use established categories and naming conventions. The term is sometimes used in educational contexts to illustrate how fictional minerals are described and integrated into worldbuilding.