Colors Irene Hill 7/12/2016 5:05 pm This is actually a question: since these earrings are 100% niobium, how is it that they come in several colors? Is it a heat process or something else? I have a metal sensitivity so I am very interested in this metallic element for jewelry. Fusion Customer Support Update: Thank you for your question! Please see our email reply to you! All of the Niobium earwires are 100% niobium. Niobium is an elemental metal which is strong yet flexible. Niobium is chemically non-reactive, therefore very hypoallergenic. It can be transformed into brilliant colors through the anodizing process. The colors are created by refracted light, do not use paint or dye and do not negate the metal's hypoallergenic qualities. Please email firstname.lastname@example.org with further questions!