cordierite

cor·di·er·ite  (kôrd--rt)

n.

A dichroic violet-blue to gray mineral silicate of magnesium, aluminum, and sometimes iron. Also called dichroite.

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[French, after Pierre L. Cordier (1777-1861), French geologist.]

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cordierite [ˈkɔːdɪəˌraɪt]

n

(Earth Sciences / Minerals) a grey or violet-blue dichroic mineral that consists of magnesium aluminium iron silicate in orthorhombic crystalline form and is found in metamorphic rocks. Formula: (Mg,Fe)₂AL₄Si₅O₁₈.nH₂O Also called dichroite iolite

[named after Pierre L. A. Cordier (1777-1861), French geologist who described it]

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cordierite  (kôrd--rt)

A light-blue to dark-blue or gray orthorhombic mineral. Cordierite is a silicate of magnesium, aluminum, and sometimes iron, and is found in granites and in metamorphic rocks that form under relatively low-pressure conditions. Chemical formula: (Mg,Fe)₂Al₄Si₅O₁₈.

Thesaurus

Noun

1.

cordierite - a blue mineral of magnesium and iron and aluminum and silicon and oxygen; often used as a gemstone mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition water sapphire - a deep blue cordierite often used as a gemstone