This diffuser locket opens to reveal a 1.6cm removable lava stone said to impart grounding and calming properties. The porous nature also makes it the perfect carrier for essential oils. A few drops can last a full day or more. Change scents with a quick rinse of the stone. Celebrate the phases of the moon while you annoit & adorn yourself. Handcast brass. 1"dia., 18-24"l Adjustable Chain