The story
Named after Russian instructor of mineralogy Lily Alekseevna Perekrest, + -ite. The word is an acronym of her name, last name first.
Etymology from Wiktionary, CC BY-SA 4.0.
perlialite
Today it means: A hexagonal-dihexagonal dipyramidal pearl white mineral containing aluminum, hydrogen, oxygen, potassium, silicon, and thallium. Full definition →