Kyanite is unique in having two hardness values. It has uneven splintery to fibrous fractures with perfect cleavage; it is full of small internal stress inclusions that occurred as the crystal formed at high pressure. It is usually seenin clusters of thin blades which are glassy but opaque.
Balances the whole being; clams and releases blocked emotions. Brings tranquility and quietness. Aids meditation and access to all levels of emotions.
Place a crystal on the forehead to quiet the mind and encourage clear thought.