A natural beryllium silicate, Be2SiO4, occurring as vitreous crystals sometimes used as gems.
Origin of phenaciteGreek phenāx, phenāk-, impostor + –ite1.
Ancient Greek impostor, deceiver, because of its resemblance to quartz.
Variant of phenakite
a very hard, glassy, rhombohedral mineral, BeSiO, of various colors, sometimes used as a gem; beryllium silicate
Origin of phenakiteSwedish phenakit ; from Classical Greek phenax (gen. phenakos), cheat + -ite: from being mistaken for quartz