Aids central nervous system, thyroid gland, body reflexes, pituitary gland, pancreas. Strengthens immunity,. Improves memory. Eases physical/emotional trauma and reduces the need to self harm. Reduces stress, calms mind. Aligns root and heart chakras for bringing love into action and manifestation (red and black variety). Self esteem, confidence. Enhances energy levels in body/mind. Pink variety (without black) helps impart understanding of strength within vulnerability. Great stone for light workers serving in cities. Chakras: Root, Heart.