dumortierite

dumortierite

[doo-mawr-tee-uh-rahyt, dyoo-]
noun
a mineral, aluminum borosilicate.

Origin:
1880–85; < French, named after Eugène Dumortier, 19th-century French paleontologist; see -ite1

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World English Dictionary
dumortierite (djuːˈmɔːtɪəˌraɪt)
 
n
a hard fibrous blue or green mineral consisting of hydrated aluminium borosilicate. Formula: Al7O3BO3(SiO4)3
 
[C19: named after Eugène Dumortier, 19th-century French palaeontologist who discovered it]

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