1000 Jewels Oceana: Mens 3.0ct Navy Simulated Blue Sapphire USA Military Signet Ring 316 Steel, 3151 Rugged, handsome and durable Mens USA - US Navy 316L Stainless Steel Ring Features a 3.0 carat Simulated Blue Sapphire bezel set solitaire. Made with solid Stainless Steel 316L. Features the inscription, "United States Navy" around the stone.