Mookaite Jasper stimulates the root chakra. Provides healing and balancing energy. Boosts self esteem and calms worries. Helpful for procrastination. Helps boost the immune system. Aids in bladder and kidney issues. 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 used for size reference. Please note small runs approximately 1-2 inches, medium are 2-3 inches. Large and Extra Large are by weight. Large are 3-4 pounds and extra large are 8-10 pounds. All of these are very different size wise. Please note Mookaite rough has some sharp edges , handle with care.