3-4 cm tumbled stone. The hawk's eye is the stone of empathy, dialogue, and adaptability. Hawk's eye is the perfect stone for people whose lives are changing and who need an open mind. Ideal for eye problems. Helps people to open up to others. makes it easier to be open to change. allows a better openness to others soothes eyesight disturbances regulates the respiratory system promotes calming purifies the respiratory tract