Zengo Aromatherapy Necklace & Oil Set Teardrop Lava Stone Necklace + Calm Oil Set Gold Finish 16 inch necklace with 2 inch extender chain & teardrop lava stone. Therapeutic jewelry that combines the healing properties of gemstones with essential oils. Crafted with an essential oil blend that creates a sweet, serene fragrance conveying feelings of peace, calmness, and happiness with its combination of Sweet Orange, Coriander, Cedar Wood, Lime and Vanilla. How to use: simply drop the essential oil.