C13 crisopace, from Old French, from Latin chrӯsoprasus, from Greek khrusoprasos, from chryso- + prason leek
chrysoprase in American English
(ˈkrɪsəˌpreɪz)
noun
a light-green variety of chalcedony, sometimes used as a semiprecious stone
Word origin
ME & OFr crisopace (& Late OE crisoprassus) < L chrysoprasus < Gr chrysoprasos < chrysos, gold (see chrysalis) + prason, leek (see prase): so called from the color