pyroxene
/ˌpaɪˈrɒksiːn/noun
- any of a large class of rock-forming silicate minerals, generally containing calcium, magnesium, and iron and typically occurring as prismatic crystals辉石。
词源
early 19th cent.: from PYRO- 'fire' + Greek xenos 'stranger' (because the mineral group was supposed alien to igneous rocks).