The Calm Diffuser Bracelet includes both Lava Stone beads and White Howlite beads. White Howlite is a calming, soothing stone that dispels anxiety and stress, making it ideal for encouraging spirituality, patience, harmony, and meditation. Lava Beads are made from Natural Volcanic Basalt. The lava stones acts as a sponge-like carrier as it soaks up your oils and retains them in the core of the Bead.