Onyx Stone with Micro Paved Clear CZs Border and Celtic Cross on Sides Square Cast Ring Stainless Steel Stainless steel is corrosion resistant and will not tarnish. It is a very strong and very durable metal. Material: High Quality Grade 316L Surgical Steel Comfort Fit - Contoured on the inside for a comfortable fit. Wear it for any occasion! Exceptionally High Quality Jewelry!