Niobium is a reactive metal. It receives its color due to anodizing with electricity. Batches of Niobium can be slightly different colors, just like dye lots, so be sure to purchase enough rings at one time to complete your project. We anodize the rings after they are cut, so the color completely covers the ring, even the cut end. However this also means that different sizes (both gauges or diameters) of the same color may not match exactly, since they are anodized at different times.
There can be a variation of color occurring in varying amounts from ring to ring and from batch to batch with Niobium. This color variation is a feature property that adds to the beauty of Niobium.
Please check our return policy before purchasing niobium jump rings.
AWG Wire Measurements: