The roll-on bottle allows the oils to be applied precisely and easily to the skin. The ball is made of smoothly polished amethyst. The stones placed inside provide a unique visual effect, it is also believed that they enhance the effect of the given mixture.Amethyst is believed to have healing properties, that protect the bearer against negative energies. The stone also brings clarity and peacefulness to the waking mind, It is also said it can control evil thoughts, initiate wisdom and think more clearly. 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.