Lapis Lazuli

Is said to be a powerful crystal for activating the higher mind and enhancing intellectual ability. It stimulates the desire for knowledge, truth and understanding, and aids the process of learning. It is excellent for enhancing memory. A stone of truth, Lapis Lazuli encourages honesty of the spirit, and in the spoken and written word. Wear it for all forms of deep communication. It is also a stone of friendship and brings harmony in relationships. 
Lapis Lazuli