\Chrys"o*lite\, n. [L. chrysolithos, Gr. ?; chryso`s
gold + ? stone: cf. F. chrysolithe.] (Min.)
A mineral, composed of silica, magnesia, and iron, of a
yellow to green color. It is common in certain volcanic
rocks; -- called also {olivine} and {peridot}. Sometimes used
as a gem. The name was also early used for yellow varieties
of tourmaline and topaz.