This bracelet can be used as an oil diffuser. Simply add one drop of any essential oil to a couple of the black lava rocks. The effect will last for a couple days before you have to reapply. This piece features beautiful natural amethyst. It is on elastic and will stretch to fit up to an 8" wrist. All PeaceFrog jewelry items are made by me! Take a look through my boutique for coordinating jewelry and more unique creations.