Moonstone is good for balancing the chakras. It is a stone of new beginnings. Moonstone helps calm emotions, balances male and female energies, and alleviates stress. Moonstone is good for the reproductive system, pms, pregnancy, and childbirth. Moonstone is also helpful for insomnia, skin, hair, and eyes. 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. These rough chunks of moonstone run approximately 3-4" each.