Bismuth Crystals Chemical Composition: Bi Hardness: 2 - 2.5 Metaphysical Properties: Stone of transformation, progression, and order. Corresponding Astrological Sign: Aquarius Metaphysical Properties of Bismuth: Bismuth aids the transit between the physical and Astral or spiritual realms. Good for pre-planned Astral Travel. Relieves emotional and spiritual isolation, allowing one to feel a connectedness with All That is. A stone of transformation. It transforms the energy of the Crown Chakra to energize the Base Chakra (in contrast to many stones) and actualises the power of wisdom.