Inside the bottles are gemstones such as green aventurine, red jasper, sodalite, rose quartz, clear quartz, amethyst and black tourmaline. The roller ball is also made from natural stone, allowing oils to glide smoothly without the sticking often found with plastic rollers. Ideal for essential oils, fragrance oils, blends and essences, these bottles are perfect for creating personalised aromatherapy products. Available with silver or wooden caps, each bottle includes the roller insert, with additional tips available separately.