cordierite
/ˈkɔːdɪəraɪt/noun
mass noun
- a dark blue mineral occurring chiefly in metamorphic rocks. It consists of an aluminosilicate of magnesium and iron, and also occurs as a dichroic gem variety.堇青石。
词源
early 19th cent.: named after Pierre L. A. Cordier (1777-1861), French geologist, + -ITE1.