Our Niobium Crystal Bezel Post Earrings feature Swarovski Crystals in a variety of colors and sizes set in Argentium Silver bezels on handmade pure Niobium posts. 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. We make the posts a standard length, but can make them a custom length for your ear lobe comfort if desired. 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 bezels do rest upon the front side of your ear lobe. These stud earrings come with Commercially Pure Grade 1 Titanium ear nut earring backs.