Niobium is a natural material, element number 41 on the periodic table, weighs just slightly less than sterling silver. The color of unanodized niobium is a warm gray, very similar but just a shade darker than surgical steel.
When anodized, a layer of "skin" forms on the metal surface. Depending on the thickness of the layer, it exhibits the interference colors of the spectrum:
- Going from low voltage colors in chocolate brown, eggplant purple, dark indigo blue,
- To mid range colors of pale baby blue, silver, bronzy gold, salmon pink,
- Plus some of the most brilliant colors at high voltages, such as fuchsia/violet, blue purple, teal, lime green, and antique rose gold.
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