Cyanite, also known as kyanite, is a mineral that is typically blue in color and is composed of aluminum silicate. It is commonly formed in metamorphic rocks and is characterized by its distinctive layered structure. Cyanite is often used as a refractory material due to its high resistance to heat and is also valued in the production of ceramics and glass. Its unique properties include anisotropy, meaning its hardness varies depending on the direction of measurement.
