Liesiin

Liesiin is a fictional mineral that appears in speculative geoscience writings and world-building wikis. In the lore, liesiin is a lithium-rich silicate mineral that forms during high-grade metamorphism under reducing conditions. The name is derived from the Lies region in the fictional country of Norda, a setting found in several novels and role-playing games.

Crystal morphology is described as short prismatic to tabular crystals with a vitreous to faint metallic luster. Colors range from colorless to pale blue or green, influenced by trace elements and irradiation. Reported hardness is about 6 on the Mohs scale, and density is placed around 3.1–3.4 g/cm3 in the fictional data.

In the fictional geology, liesiin occurs in metamorphic rocks such as marble and metabasite, often in downgoing hydrothermal zones. It is said to form as lithium is incorporated into silicate frameworks during metasomatic reactions, and it is typically associated with quartz, muscovite, and spodumene in described deposits. The mineral is described as rare and economically significant within its world, but not known to occur on Earth.

Uses and cultural role: In the stories, liesiin is discussed as a potential energy storage material due to its lithium content and as a gemstone when sufficiently pure. UV fluorescence is sometimes noted as a diagnostic feature in field drawings.

References: Liesiin is a fictional construct; references appear in narrative materials, glossaries, and community wikis rather than in scientific databases.