Amarallitine, a substance used in alchemy, is described to come in a shade of luminescent yellow. It is described by Elwin as volatile, and is kept in a vial. When it was mentioned in Book 1: Keeper of the Lost Cities, Dex used a pair of quite lengthy tongs to handle it. In preparation for the reaction it can cause, Kesler also put on a pair of thick black glasses. In the solution the Dex and Kesler were creating, it exploded after this substance was put in.