Aluminium Borosilicate: Al7BO3(SiO4)3O3
Dumortierite is a stone of order. It is used to enhance self-discipline, organizational abilities, and general orderliness.
Dumortierite brings this sense of order and clarity to all things, and releases fear, bringing courage to one’s life. It also acts as a booster for creativity and expression, bringing raw creative energy into an organized state allowing higher expression of that creativity.
In the psychic and spiritual realms, Dumortierite raises spiritual development, as well as contact with spirit guides and angels.
To read more about Pendulums, what they are, and how to use them, see https://thezentist.co.uk/articles-at-the-zentist/an-introduction-to-the-pendulum/.