Definition of cordierite in English:

Share this entry


Pronunciation: /ˈkɔːdɪərʌɪt/


[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.

For editors and proofreaders

Line breaks: cor¦dier|ite

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.