The lava rock acts as a natural diffuser and absorbs the oils giving you aromatherapy wherever you are. You can use multiple different oils the same day as one application lasts around 4 hours. All bracelets are stretch and have hematite spacers and quartz or howlite surrounding the lava. Fancy Jasper intensifies and lightens the feeling of well-being, helping one to lighten up and enjoy themselves more, yet in a subtle way. It can relieve fear, frustration, and guilt, building inner strength.