The roll-on bottle allows for precise and easy application of oils to the skin. The ball is made of smoothly polished green aventurine, and the stones inside provide a unique visual effect. It is also believed that these stones enhance the effects of the mixture. Aventurine is thought to bring good luck, prosperity, and success. It is also said to be helpful for connecting with angels and spirit guides, making it a useful stone for meditation and spiritual work. These Gemstone Roller Bottles can be filled with a variety of liquids, such as essential oils, perfume oils, DIY sample blends, essences, and more. They are perfect for aromatherapy and other personal care applications.