Fossilised red oak wood is hand-carved and set within and engraved square case with black enamel detailing, replicating the natural texture of wood. Fossilisation occurs when a red oak tree transitions to stone during the permineralization process, over the course of a few million years. Decorate your sleeve with one of the Earth's natural treasures. Finished in rhodium plated sterling silver. Limited edition of 26 pairs. The colour and natural formation of our organic materials differs from one another due to natural variation, making each piece truly one of a kind.