Our Niobium Gemstone Stud Earrings feature a variety of gemstones in a variety of colors and sizes on handmade pure Niobium posts. 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. These stud earrings come with Commercially Pure Grade 1 Titanium ear nut earring backs.