Spiritual Believed to be a stone of protection, it is said to transform negative energy, calm the mind and help to find higher planes of reality.

Mental Promotes logical thinking, memory and problem-solving abilities. Neutralizes anger and tension and boosts self-confidence.

Physical Heals blood-related problems. It's said to oxygenate the blood and help ease anemia, heart, kidney and liver diseases. It's also recommended for jet lag.