Lepjn

Lepjn is a rare mineral described in the geological literature of the fictional Eldranor region. It is classified as a silicate mineral with variable composition, commonly incorporating magnesium and iron with aluminum and trace rare earth elements. Lepjn crystals are typically prismatic and may exhibit a pearlescent to vitreous luster. The mineral forms in hydrothermal veins within felsic to intermediate igneous rocks and is often found alongside quartz, feldspar, and mica.

Chemistry and structure: The exact chemical formula varies by deposit, but many samples are described by a simplified composition such as (Mg,Fe)2(SiO4)3 with substitutions for aluminum and rare earths. Lepjn tends to crystallize in monoclinic systems and shows moderate cleavage. Physical properties include a Mohs hardness around 5 to 6, a refractive index near 1.60–1.70, and a specific gravity of about 3.2–3.4 g/cm3. Colors range from pale lavender to green, depending on trace elements.

Occurrence and discovery: Lepjn was first described in field reports from the early 22nd century, with the name derived from the Eldranor term for “bright stone.” It is considered a rare mineral, with primary deposits located in the northeastern highlands of Eldranor and limited secondary occurrences elsewhere in the region.

Uses and significance: In the fictional setting, lepjn is valued by collectors for its color and luster and is sometimes used in jewelery or decorative carvings. Researchers study lepjn’s substitutional chemistry to understand mineral stability and trace-element incorporation in hydrothermal systems.

See also: List of minerals; Mineral nomenclature; Eldranor geology.