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kyanite

noun ky·a·nite \ˈkī-ə-ˌnīt\

Definition of KYANITE

:  an aluminum silicate mineral Al2SiO5 that occurs usually in blue thin-bladed triclinic crystals and crystalline aggregates
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Origin of KYANITE

German Zyanit, from Greek kyanos dark blue enamel, lapis lazuli
First Known Use: 1794

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