*chrysolite*

n. [ L. chrysolithos, Gr. &unr_;; chryso`s gold + &unr_; 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. [ 1913 Webster ]