These elastic rings are made up of lava beads, olivine beads and sterling silver spacer beads.
Given that they’re elastic they will suit most sizes. (They all have a circumference of approximately 6.5cms).
Olivine is a volcanic mineral characteristic of Lanzarote. Its gemstone form is called peridot.
It has been found on our lava rocks as well as on some meteorites and even on the Moon!