Small Single Terminated KYANITE Tower GeneratorWhat is Kyanite? Kyanite is a naturally occurring aluminum silicate mineral commonly found in metamorphic rocks. It is most famous for its blue blade like crystals, though it can also appear white, green, black, or orange. Key characteristics: Chemical formula: AlSiO Crystal system: Triclinic Common color: Blue (the most popular variety) Unique property: It has different hardness depending on the direction you scratch it (an unusual mineral property).