Iolite

Also known as Cordierite. Iolite crystallizes in the form of masses, grains, and short prismatic crystals. Colors can include blue, brown, grey, yellow, dark violet, and green. Exhibits pleochroic properties: the color can change when viewed at different angles.
Metaphysical Properties: called the "violet stone." Stone of spiritual growth. Stimulates visions and has been used in Shamanic healing. Balances male/female aspects, brings harmony to relationships. Precision, acceptance of responsibility, prudent management of money.
Astrological Signs: Libra, Sagittarius, Taurus
Chakras: Third Eye and Crown