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cordierite

Pronunciation: /ˈkɔːdɪərʌɪt/

Definition of cordierite

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.

Origin:

early 19th century: named after Pierre L. A. Cordier (1777–1861), French geologist, + -ite1

cordierite in other Oxford dictionaries

Definition of cordierite in the US English dictionary