The roll-on bottle allows the oils to be applied precisely and easily to the skin. The ball is made of smoothly polished rose quartz, and the stones placed inside provide a unique visual effect. It is also believed that they enhance the effect of the given mixture. Rose quartz, known as the stone of love, brings a sense of peace and tranquility. It helps to achieve inner peace and balance. These gemstone roller bottles can be filled with any mixture that you know will work well. They are perfect for use with essential oils, perfume oils, DIY sample blends, essences, aromatherapy, and other liquids.