Swarovski ss12 rhinestones are 3.2mm highly polished cut glass lead crystals that are multi faceted and extremely sparkly when they come into contact with light. They are ideal for adding some sparkle to nail art and decorating small appliances like mobile phones, mp3 players and other small gadgets. These small rhinestones also known as flat backs have a silver foil backing so that when you add adhesive to them they are able to bond well to smoother surfaces.