Lava stones are by nature quite porous, meaning they have lots of tiny holes inside them. The porous nature of the stones makes this tassel necklace a perfect diffuser for whatever essential oil you prefer to use. Simply add a drop or two of your favourite oils and rub them on the black lava beads. Lava stones can help with grounding the wearer and relieving their stress and anxiety. These properties are enhanced through the use of various essential oils, which provide further relief from these symptoms. A perfect gift.