Product information for Volatile Aromasteen: Application of Volatile Aromasteen: Place a few drops of essential oil or a mixture of essential oils on the aroma stone. The oil is absorbed into the porous stone and gradually evaporates, allowing the scent of the oil to fill the room. Particularly suitable for small spaces: bedroom, hallway, toilet or in the wardrobe. For large spaces it is better to place the stone on the radiator.