Kyanite has been used as a semiprecious gemstone, which may display cat's eye chatoyancy, though this use is limited by its anisotropism and perfect cleavage.
Kyanite waxaa loo isticmaalay dhuxul dhagax madow, oo laga yaabo inay muujiso caruusha indhaha, inkasta oo isticmaalkaasi uu xadidan yahay anisotropism-ka iyo kala-soocidda fiican.