The roll-on bottle allows the oils to be applied precisely and easily to the skin. The ball is made of smoothly polished rock quartz. The stones placed inside provide a unique visual effect, it is also believed that they enhance the effect of the given mixture.Rock Quartz is said to have healing properties, such as promoting emotional balance, and enhancing intuition and decision-making. It is also said to be a stone of clarity, helping to clear the mind and enhance spiritual growth.Fill these Gemstone Roller Bottles with anything, that you know will sell good. They are perfect for use of Essential Oils, Perfumes Oils, DIY Sample Blends, Essence, Aromatherapy and other liquids.