Blue Kyanite is a aluminosilicate mineral that has a triclinic crystal system and a varying hardness of 4.5 - 7. It can be translucent or transparent.
Metaphysically, although blue kyanite works especially well for activating both the throat and third eye chakras, it is also a very powerful stone for increasing energy flow to all chakras and putting them all into alignment. Kyanite is know as one of the most powerful protection stones and is also said to act as compass when one is feeling lost in life. It raises one's vibe, encourages restful sleep, rational and logical thought, harmony and self-expression. It is also said to help in easing anger and frustration, stress and anxiety. It promotes justice, truth, diplomacy and fairness. Blue kyanite can enhance manifestation and open intuitive and telepathic communications.