Beautiful 6 mm Aquamarine beads, as well as 6 mm lava beads. Use your favorite aromatherapy oils on the lava beads. Bracelets are made using stretch cord and are available in 7", 7.5", and 8". Because these are handmade, there may be slight variations in bead color. Aquamarine, the stone of the sea, has a calming effect. It is said to aid in calming traumatic situations and alleviate sinus, lung, and respiratory problems.