Rings by Yvonne Gilhooly This ring set is perfect worn ' back to back ' on their own or alongside other rings from my enso series to create your own unique combination. Features Primary Material : oxidised silver One of a Kind : No Metal : oxidised silver Hallmarked : No Cleaning InstructionsThe oxidised surface will wear over time to an antique gray finish, with the high points becoming polished. I am happy to re - oxidise should you require this service.