Serpentine aids in meditation and spiritual exploration. Serpentine stimulates the crown chakra. It also helps one feel more in control of their life and helps balance emotions. Helps with diabetes and detoxifying the blood. Metaphysical properties are provided for your information and are not meant to replace the advice of a qualified physician or medical practitioner. Due to the nature of this product, color, size, and shape will vary. Quarter is for size reference.