Chiastolite, also known as Andalusite, is a uniquely patterned stone, with an inner geometrical formation that has a natural black cross arrangement in its structure that can often be seen. Chiastolite assists in strengthening the energy field and helps to clear old patterns that interfere with moving forward. As a transformational stone, it connects strongly with spiritual energies and is a powerful meditation stone. Chakras: All. Element: Storm.