These earrings are made with black lava beads for essential oil diffusing aromatherapy. They also have Rondelle gold color Czech crystal beads, silver spacers, round crystal spacers and silver round balls. The lava beads are porous with “craters” on them. You can drop one drop of oil on each bead (a little goes a long way, so you add to the 2 or just 1 bead) it will last 2-3 days. Apply straight from bottle or with a qtip and rub oil on the bead. Perfect for a healthier alternative instead of wearing chemicals. After 2 or 3 days, the aromatherapy on the lava will start to fade. You can use more oil on them and any kind you’d like. There are certain oils that will last as long or longer than 7 days. You can reapply oils as often as you prefer and any oil that you like.