Cordierite meaning

kôr'dē-ə-rīt'
A dichroic violet-blue to gray mineral silicate of magnesium, aluminum, and sometimes iron.
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A bluish, very hard, pleochroic, crystalline mineral, magnesium aluminum silicate, (Mg,Fe)2Al4Si5O18, used sometimes as a gem.
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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.
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Origin of cordierite

  • French after Pierre L. Cordier (1777–1861), French geologist
    From American Heritage Dictionary of the English Language, 5th Edition