Cyanite, also spelled kyanite, is a mineral typically found in metamorphic rocks. It is composed primarily of aluminum silicate and is known for its distinct blue color, although it can also appear in green, black, or white variations. Cyanite has a characteristic bladed or fibrous crystal structure and is frequently used as a raw material in the production of ceramics, glass, and refractory materials. Its unique property is that it has different levels of hardness depending on the direction of the crystalline structure, making it an interesting subject of study in mineralogy.
