Lobal Domination 1pc Lacey Single Opal Septum Clicker Surgical Steel 16g Pierced Nose Ring Fast shipping 1 piece opal septum and you choose your color! Material: Post is 316L Surgical Steel, remainder is Rhodium Plated Brass - Gem is Synthetic Opal Can be cleaned with polishing cloth and/or warm water. Plating can wear off over time. The life of rhodium and/or gold ion plating depends on many factors, especially individual body chemistry and the amount of wear the jewelry receives.