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cordierite Line breaks: cor¦dier|ite
Pronunciation: /ˈkɔːdɪərʌɪt/

Definition of cordierite in English:


[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.
Example sentences
  • Monazite clusters occur in a variety of host minerals, including cordierite, quartz, biotite and andalusite.
  • Sericite is fine-grained muscovite formed by alteration of such minerals as feldspar, cordierite, and sillimanite.
  • Sillimanite, cordierite, apatite, monazite and zircon are also present.


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

Definition of cordierite in:
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