Iron Cross Skull Ring — 925 Sterling Silver with Blue Gemstone EyesEighteen grams of solid . 925 sterling silver. Individually cast with oxidized iron cross marks on both temples and two deep set blue gemstone eyes that catch light from across a room. The Iron Cross Skull Ring is a sterling silver biker ring built for people who wear their jewelry. Not just photograph it. Best for daily wear and for riders who want something that holds up through rain and road grime. It won't lose its edge over a long season. The