These A-grade tumbled Green Aventurine/Green Quartz are imported from South Africa. Each piece measures between 1/4 inch to 3/4 inch. These are high quality stone tumbles for all your crafting, jewelry-making and crystal healing needs. *100% CUSTOMER SATISFACTION GUARANTEED. If for any reason you are not happy with the crystals you receive, just simply send us a message and we will make sure that you are satisfied. *Photos are for representation only. Since these are made by Mother Nature herself, please allow variation in shapes, size and shades of color.