Eksimuse

Eksimuse is a fictional mineral described in speculative geology as a rare aluminum–magnesium silicate. It forms in high-grade metamorphic environments and is notable for electric blue to emerald green crystals. Crystals are typically prismatic or tabular, often forming slender aggregates in quartz-rich veins. The mineral is usually translucent with a vitreous to resinous luster.

Discovery and occurrence: Eksimuse was first described in literature in 1987 by geologist L. Mura in the fictional Sundrag Range. It is said to occur in granulite facies rocks, commonly in association with garnet, muscovite, and quartz. While real-world localities are fictional, reported samples are described as rare and highly distinctive. Synthetic analogs have been produced for laboratory study.

Properties: In the fictional account, eksimuse has a Mohs hardness of about 6 to 6.5 and a refractive index near 1.70 to 1.74. It is described as showing strong pleochroism, shifting from blue to green with crystallographic orientation. Its composition is portrayed as dominated by aluminum and magnesium, with silicon and trace vanadium contributing to its coloration and optical properties.

Etymology and naming: The name eksimuse is presented as deriving from a combination of a family name and a postscript that evokes its luminous appearance. In the fictional context, the term is used to illustrate the diversity of mineral species in advanced metamorphic settings.

Uses and significance: Within fiction, eksimuse is valued as a decorative gemstone and sometimes depicted as having potential ceramic or dielectric applications due to purported stability and optical effects. In real-world practice, eksimuse has no known industrial mining status and exists solely in speculative narratives.