You asked, and we delivered. These are 8mm porous lava rock beads with a metallic green titanium coating. These coated lava rock beads are perfect for use with essential oils. Gently dab on a little bit of your favorite essential oil for a subtle dose of aromatherapy. Match these natural beauties with some wood beads for a more ethnic look. We think you will really enjoy designing with these titanium coated lava rock beads.