Niobium

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Niobium is a chemical element. Its symbol on the Periodic Table of the Elements is Nb and its atomic number is 41. Niobium is a soft grey metal that is often used in alloys and sometime used in eyeglasses and jewelry because of its low toxicity (and therefore low rate of allergic reactions) and its ability to be anodized producing a virtual rainbow of colors.

Lang Antiques
Lang Antiques