The pendant is made of glazed kiln fired clay, and the necklace is waxed cotton with an adjustable sliding knot. This beautiful handcrafted ceramic pendant makes it possible for you to carry the healing power and rejuvenating scents of essential oils with you everywhere you go. The “pocket” design of our pendant provides the optimal personal diffusing method. This design keeps the majority of your essential oil in the pendant producing a time release effect that eliminates access evaporation of oils into the air. A small ball of cotton that stays hidden is inserted into the “pocket” and easily absorbs the oil.