Lava Stone is a natural stone that has cooled down lava, which formed into the shape of rocks. Lava stone has small holes, which give it its porous look which is perfect for adding a few drops of essential oils to! Our beautiful bracelets are adjustable to fit any size wrist. Simply pull the cords to loosen or tighten. Each stone is .31"(8mm). These bracelets can be worn alone or stacked with our other bracelets. Add a couple of drops of essential oils to the lava beads for some aromatherapy thr Adjustable Natural Stones Braided Bracelet For Meditation, Adjustable Braided Bracelets With Natural Stones For Meditation, Adjustable Black Lava Stone Beaded Bracelets, Casual Lava Stone Jewelry With 8mm Beads, Adjustable Black Lava Stone Bracelet, Adjustable 8mm Lava Stone Beaded Bracelets, Casual Hand-strung Lava Stone Beaded Bracelets, Casual Hand-strung Lava Stone Bracelets, Casual Hand-strung Beaded Bracelets With Lava Stone