pearl essence

noun
  1. a lustrous, silvery-white substance obtained from the scales of certain fishes or derived synthetically, as from mercuric chloride: used chiefly in the manufacture of simulated pearls and as a pigment in lacquer (pearl lacquer).

Origin of pearl essence

First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018