du·mor·ti·er·ite (d -môr t - -r t , dy-)n. A glassy pink, green, violet, or blue aluminum borosilicate mineral, Al8BSi3O19OH, used in spark-plug ceramics and as imitation lapis lazuli. [French, after Eugène Dumortier, 19th-century French paleontologist.] |
dumortierite [djuːˈmɔːtɪəˌraɪt]
n
(Earth Sciences / Minerals) a hard fibrous blue or green mineral consisting of hydrated aluminium borosilicate. Formula: Al7O3BO3(SiO4)3
[named after Eugène Dumortier, 19th-century French palaeontologist who discovered it]
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