Kyanite is a blue silicate mineral commonly found in metamorphic rocks. It is composed mainly of aluminum and silicon and is known for its unique crystal structure, which can create elongated, blade-like shapes. Kyanite is often used in the production of ceramics and as a gemstone in jewelry. This mineral is notable for its variable hardness, which can range from 4.5 to 7 on the Mohs scale, depending on the direction of the crystal. Kyanite is typically found in regions with high-pressure conditions, such as mountain ranges formed by tectonic activity.