Green Aventurine is useful in releasing negativity and energy blockages. Brings calmness. Benefits the lungs, liver, sinuses, and heart. Supports the heart chakra. Settles nausea. 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.