epidote
/ˈepɪdəʊt/noun
mass noun
- a lustrous yellow-green crystalline mineral, common in metamorphic rocks. It consists of a basic, hydrated silicate of calcium, aluminium, and iron.绿帘石。
词源
early 19th cent.: from French épidote, from Greek epididonai 'give additionally' (because of the length of the crystals).