Dumortierite is a lovely deep blue. It is one of the lesser known stones and, to me, it's gifts are often overlooked. It has a calming, stable, comforting, grounded energy and is my personal favourite to bring a good night’s sleep – both falling asleep and staying asleep.
It encourages self-belief, helping to bring confidence in trusting one’s own perceptions and viewpoints, and this in turn releases stress and confusion.