Approx 1.5-2"
 
Kyanite
Kyanite forms in blade like crystals and clusters that exhibit a triclinic structure and have a hardness of 5.5 to 7 on the Mohs hardness scale. Kyanite usually forms in blue crystals but also comes in clear,green and very rarely in pink.
Kyanite is an excellent crystal for use in energy work. Kyanite cleanses all chakras from the root chakra to the crown chakra. This crystal is also very useful in cutting the ties between past situations, people, places and habits. Kyanite works specifically on the throat chakra and is great for singers, orators and for use in psychic development.