These bracelets are hand-made on Maui using beads made from natural volcanic basalt combined with colored beads. They are perfect to use with essential oils. Due to their sponge-like composition, the beads soak up the oil and retain it in the core of the bead. Simply add a drop or two to the lava beads and your diffuser bracelet will carry your favorite scent. Lava is known to be a grounding stone that has connections to the earth. They are strung on an elastic cord and one size fits most. 8-8.5 mm beads. Packaged in a gauze drawstring pouch for giving.