The "stone of Total Awareness". Promotes esoteric study. Activates crown and throat chakra. Provides unification of all chakras. Release one from emotional bondage. Used on the third eye to promote dream insight. Stimulates emotional, mental and physical clarity. Helps one to overcome depression. Promotes serenity and self-acceptance. Balances yin yang energies. Protects against psychic attacks. Egyptians believed this stone to be a "Stargate". Throat. Bone marrow. Insomnia. Ears. Corresponding astrological sign : Libra