It is a magic wishing box, you can add the harmony ball. Be known as angel caller to bless the one you loved. Putting the lava stone or the aromatherapy pads, it can be an essential oil diffuser pendant.
harmony ball link: https://www.topearl.com/collection/harmony-ball/harmony-chime-ball.html
lava bead(No Hole) link: https://www.topearl.com/beads-findings/lava.html