This lava and natural stones allow you to apply your favorite helping oils directly to the porous lava stone beads. The lava beads act as a natural diffuser to motivate, inspire, calm and support your good health. Simply drop onto the black lava beads and reapply as needed. Purple agate, tiger eye, blue agate, turquoise, yellow agate, red turquoise and amber agate enhance the design with lead-free 18k gold finished accents between. Great adult fit.