Hardness: 7 Structure: Rhombohedral Zodiac: Cancer, Pisces, Scorpio Chakras: Root Properties: The official state gemstone of Minnesota Physical: Used to cure insomnia, chest issues and disease, cleansing the organs Emotional: Offers support, courage, stability, stress relief, focus and confidence Spiritual: Used to counter black magic, connect with the water element and spirits, cleanse the soul, as well as grounding and protection