Our Niobium Drop Earrings feature Swarovski Crystals in a variety of colors and sizes set in Argentium Silver bezels on handmade pure Niobium ear wires. The clean, modern bezel setting of the crystals on this style are framed on the front by a thin line of Argentium Silver with the bezel being visible from the sides as well. These bezel set crystals sit at the base of the ear lobe, barely dropping below in a modern, simple, minimalist design. Pure Niobium is sometimes denoted as 999 Niobium. It is naturally nickel free, chromium free, and cobalt free. Niobium is ultra comfortable and often people remark that they forget they are even wearing earrings while they are wearing Niobium. Argentium Silver (or Argentium Sterling Silver) is 92.5% silver, 6.3% copper, and 1.2% germanium. It is tarnish resistant so it requires less frequent polishing than Sterling Silver. The Argentium Silver in these drop earrings does not come into contact with your ear lobe during wear. These drop earrings come with plastic safety ear nuts to keep the ear wires securely in place.