Kyanite << KY uh nyt >> is a pale-blue mineral commonly found in metamorphic rocks (see Metamorphic rock). The word is also spelled cyanite << SY uh nyt >>.
Kyanite is formed under high temperatures and pressures. It occurs as long flat bands of crystals, and its surface varies in hardness. Kyanite is found in Australia, East Africa, India, and the United States.
Kyanite is used as an insulating substance because it is heat resistant. Some ovens used to manufacture glass and ceramics are lined with kyanite. Transparent kyanite is cut into gemstones for jewelry.
