柯林斯詞典olivine /??l??vi?n, ??l??vi?n/ 1. N an olive-green mineral of the olivine group, found in igneous and metamorphic rocks. The clear-green variety (peridot) is used as a gemstone. Composition: magnesium iron silicate. Formula: (MgFe)2SiO4. Crystal structure: orthorhombic 橄欖石 (Also called chrysolite) 返回 olivine