zoysz
Zoysz is a fictional mineral species that appears in speculative fiction, tabletop role-playing games, and related media. In most in-universe descriptions, zoysz is a dense, silicate-rich mineral notable for a pale blue-green color, a high refractive index, and a faint bioluminescent glow that intensifies near electric fields. Its fracture surfaces display a distinctive radiating pattern, and it is unusually resistant to cleavage, making it a coveted material for both ornament and hardware within the stories.
The name zoysz is said to originate from the Zoy language of the island chain of Zayra,
In geological terms within the fiction, zoysz is described as forming in ultra-high-pressure environments such as
Zoysz has appeared in novels, game supplements, and fan wikis as a plot device that motivates exploration,