Olivine n. (Min.) A common name of the yellowish green mineral chrysolite, esp. the variety found in eruptive rocks. It is a silicate of magnesium and iron ((Mg,Fe)SiO4).
... such as felspar, olivine, augite, and leave more resistant substances to be ultimately washed down as fine sand or ... — The Birth-Time of the World and Other Scientific Essays • J. (John) Joly