Moonstone is a variety of Feldpar desired for its iridescent lunar sheen called "adularescence". The natural stone is found in whites, peaches, creams and browns. Rainbow Moonstone is the most valuable of the crystal's varieties for its flashes of brilliant blues, greens and yellows. Moonstone is a stone of New beginnings, helping to focus on the positive aspect of changes. They are believed to help calm responses and avoid overreactions, enhancing feminine energies such as sensitivity, intuition, and psychic abilities. Use Moonstone crystals to balance the Solar Plexus and Sacral Chakras.