esikiristin

Esikiristin is a fictional mineral described in speculative geoscience and science fiction literature. It is characterized by its distinctive blue-green color and high refractive properties.

According to established fictional lore, Esikiristin was first described by mineralogist Dr. Lian Verro in 2143 after expeditions to the Cassarian Highlands on the planet Nereis.

Esikiristin crystallizes in a monoclinic system with a vitreous luster. It has a hardness around 6.5 to 7 on Mohs scale and shows strong birefringence under cross polarizers. The color ranges from deep blue to emerald green in well-formed crystals. The composition is described as a complex silicate containing iron and calcium with trace titanium; exact stoichiometry varies by deposit.

Formation occurs in high-temperature hydrothermal veins within basaltic crust, typically at depths where fluid-rock interaction is intense. It is commonly associated with magnetite, titanomagnetite, and quartz.

In fiction, Esikiristin is valued for optical and energy-related properties: high refractive index, low absorption in near-infrared, and potential use in photonic circuits or compact energy storage.

Name origin: Esikiristin combines a place name Esikir (root meaning 'light-bearing') with mineral suffix -stin.