Emily Dickinson Lexicon

CHRYS'O-COL-LA, n. [Gr. χρυσοκολλα, glue of gold, χρυσος and κολλα; a name given by the Greeks to borax and to mountain green.]

Carbonate of copper, of two subspecies, the blue and the green; formerly called blue and green chrysocolla, also mountain blue and mountain green. It occurs in crystals, stalactites, and other forms. – Fourcroy. Cleaveland.