Dumortierite Healing Crystals are known as "The stone of Patience". It is a powerful healing gemstone and is associated with the third eye chakra. A light or dark blue colour, this stone has a waxy texture and has the ability to enhance brain power and especially good at mathematical or language based enhancement. If you are prone to angry outbursts, this stone is also great as it helps you to think things through, providing consideration before you speak.