Entisku

Entisku is a mineral term used in the geology of the fictional planet Dravon to describe a family of luminescent silicate minerals. These minerals form transparent to translucent crystals that glow under ultraviolet light and exhibit a sustained afterglow known as entiskescence. The name derives from the Dravonian root entis, meaning light, with the suffix -sku indicating mineral class.

Chemically, entisku is a silicate with variable trace elements. Crystals range from glassy to pearly luster, and color varies with impurities, commonly pale greens, blues, or pinks. It typically occurs in hydrothermal veins and forms prismatic or tabular crystals. The mineral is moderately hard and tends to cleave along basal planes, with luminescent centers that can be activated by heat treatment or irradiation.

Distribution and occurrence: Entisku deposits are reported in volcanic arcs and rift zones on Dravon, often alongside quartz, fluorite, and rare earth minerals. Mining combines open-pit and underground methods; processing emphasizes gentle crushing and flotation to preserve crystal integrity for luminescent centers. The mineral is sensitive to mechanical shock, which can impact its optical properties.

Applications and research: Entisku's luminescent properties support decorative materials, low-energy signage, and exploratory sensing devices. Researchers study luminescence efficiency, thermal stability, and color tuning through controlled doping with trace elements. Historical records document entisku from early mineralogical surveys in the Kharan and Lyran belts and its development as an industrial material within Dravon’s resource networks.