Charisma Stainless Steel Crystals Nose Studs Rings Bone Bar Pin Piercing Jewelry. Our nose studs are made with Hypoallergenic Stainless Steel and IP plated for a polished shiny finish. IP Plating (Ion Plating) is a permanent fusion coating for excellent tarnish resistance, shine and durability. Pick up them at a great deal and let your body sparkle with confidence!