Home > Term: cordierite
cordierite
An orthorhombic mineral, Mg2Al4Si5O18; Mohs hardness, 7 to 7.5; an accessory in peraluminous granite, schist, and gneiss; a gem material called saphir d'eau, water sapphire, dichroite, and iolite.
- Part of Speech: noun
- Industry/Domain: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
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- ed.young
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(Milwaukee, United States)
