Top Plaza Lava Rock Stone Essential Oil Diffuser Necklace Bracelet,Healing Energy Crystal Gemstones Beads Essential Oil Jewelry Set Bracelet/Necklace Material: Black Lava Rock Stone & Alloy. - Because made by natural stone, each one with unique color, the stone beads may not same as the picture shown. Bracelet Length(elastic): 6.8" (17.27cm) ; Bead Size: 0.31" - 0.35 " (0.8cm - 0.9cm) / Necklace Length: 18.5" - 20.5" (47cm - 52.1cm) ; Bead Size: 0.2" - 0.3" (0.6cm - 0.7cm) Lava stone is easily the oldest and most frequently found stone in world; It literally comes from the core of the earth- fiery brimstone that bubbles to the surface and cools.Once the stone is cool, it becomes porous and black, creating the beautiful black color so many have come to love. This is known as basalt, and can mostly be found in the ocean. It is quite convenient to use. Just put 1-3 drops of your favorite essential oils onto the lava rock stone, you can wear your aromatherapy oil diffuser around your neck/wrist, then you can take advantage the essential oils for a very long time. Package Includes: 1 pc Bracelet + 1 pc Necklace + 1pc Top Plaza Velet Pouch. Suitable for any occasions like birthday, Christmas, Valentine's Day and other holidays! You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!