What is that you say? It's a hypo-allergenic metal for those who have metal sensitivity. Here is a great article about niobium and learn the method it takes to color the material.
I use plated surgical steel in all my earrings. If you find a pair(s) you like at my store, I can, and will gladly, change them out to clip-ons or niobium. There will have to be an added cost for the niobium. It sure ain't cheap.
Here is a pair of earrings, by jewelry artist Michael Mara of Shimmering Dreams Jewelry, using niobium metal.