Only the finest quality volcanic rocks that have been ethically sourced from mother nature. The rocks are produced due to intense heat and pressure, which creates molten lava. When cooled, the rocks become extremely porous and therefore are perfect for allowing the slow release of our specially formulated essential oils. Only the highest quality essential oils will insure your fragrance to be long-lasting. Each fragrance has been specially formulated with an artistic pallet that will transport your senses. Volka Rock Diffusers are safe and free of all carcinogens that will create a fresh and welcoming environment. Our product is pet and child friendly and there is no need to plug-in or light it, so it can be left unattended safely in your home. Volka Rocks is produced in the United Kingdom, hand blended and hand poured with the highest level of purity. We have formulated our packaging to be environmentally friendly and recyclable. How to use: Empty the Rocks into the vessel provided, add approximately one third of your oil. Leave for 2 to 3 days, allowing the oil to be activated by the Rocks, then all you have to do is add 2 to 3 drops a week over the Rocks as required. We hope you enjoy your Volka Rock experience.