Blue Picasso: intuition, artistic creativity Using essential oils with our lava bead diffuser jewelry is very easy. Just use a drop or two of your favorite oils and rub them on the black lava beads. The easiest way is to add the oil on your finger first and then rub it on the black lava beads. You can rub the residue on your hands and inhale for extra benefit! Made with 6 lava beads and one of 12 different semiprecious stones.