Cmiyyt

Cmiyyt is a fictional mineral described in speculative geology and science fiction media as a rare silicate-oxide mineral.

In the fictional canon, Cmiyyt was first described by researchers of the Lumen Institute in 2157 after fieldwork in the volcanic region of Rho Vespa on the planet Arcturus Nine. The name Cmiyyt is a coined term derived from the researchers' initials and the suffix -yyt to suggest rarity.

Cmiyyt is described as forming slender prismatic crystals with a pearly, iridescent luster. Reported hardness ranges from 6 to 7 on the Mohs scale; refractive index around 1.74; color pale green to blue-green. Some sources note hexagonal or trigonal crystal habit in the fictional corpus.

Cmiyyt is said to form in hydrothermal veins within ultramafic rocks, often in association with magnetite, chromite, and serpentine. It is considered unstable at surface temperatures and rapidly alters to secondary minerals.

In fiction, Cmiyyt is valued for photoconductive properties and potential semiconductor applications, and is sometimes depicted as a source of ultralight energy in nanodevices. It features in various novels, games, and encyclopedic fan wikis as a collectible mineral.

This article covers a fictional mineral created for narrative and worldbuilding purposes. Any resemblance to real minerals is coincidental.