Also called volcanic stones, lava stones are black beads with a very porous composition, which allows them to absorb essential oil and diffuse it in contact with skin. You can put three or four drops of pure essential oil randomly on some of the lava stones (that is usually enough for the whole piece of jewelry!), then wait a few minutes before putting the necklace or bracelet on. Then, you repeat these steps when needed. You can always use the same oil, or vary according to your desires; we recommend keeping the jewelry on while showering if you want the oil to evaporate faster. Please refer to your essential oil instruction guide before use.