Buy Kyanite from Crystals By Nature. Derived from the Greek word 'Kuanos' meaning deep blue, Kyanite is a lovely stone that neither accumulates nor retains negative energy. Kyanite is vast when it comes to its metaphysical purposes, used mostly for cleansing and clearing other crystals. Known as a high vibration crystal, Kyanite is very powerful in promoting channeling, focusing, and direction healing frequencies. There are multiple different colors of Kyanite, ranging from black to indigo to orange, each resembling and containing different properties.