Niobium is a chemical element that appears gray or dull silver in color.However, when exposed to air, it forms a thin coating of oxide.This oxide layer can give niobium a bluish tint.
In the context of jewelry, such as body piercings, niobium can appear black. This is due to a process called anodization, where the metal is subjected to an electric current in an electrolytic bath. This process changes the thickness of the oxide layer on the metal, which in turn changes the wavelengths of light it reflects.By carefully controlling this process, a variety of colors can be achieved, including black.
Niobium is a chemical element that appears gray or dull silver...
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