myelitt

Myelitt is a fictional mineral created for use in speculative geology, science fiction, and educational demonstrations. It is not recognized by any geological authority, and there are no verified specimens in real-world collections. The term is used in various works to illustrate mineralogical diversity and the interplay of chemistry and crystallography.

In fictional accounts, myelitt is described as a magnesium- and aluminum-rich silicate with traces of iron and rare earth elements. It is said to crystallize in a hexagonal system, forming elongated prismatic crystals with a glassy to vitreous luster. Colors are depicted as ranging from pale blue to deep emerald, sometimes with a subtle internal glow under polarized light. Reported hardness on the Mohs scale is about 5 to 6, and density is described as moderate to heavy. It is commonly said to form in high-temperature metamorphic or hydrothermal environments, often occurring in vein fillings alongside other silicates and oxide minerals.

In narrative contexts, myelitt is valued for its aesthetic appeal and is sometimes attributed hypothetical electronic or photonic properties, such as luminescence or semiconducting behavior under certain conditions. However, these properties are purely fictional and vary between works. Because no empirical data or peer-reviewed analyses exist for myelitt, it serves primarily as a teaching tool to illustrate how mineral properties are defined and how fictional elements can be integrated into science writing. See also: mineralogy, fictional minerals, and science fiction world-building.