Cobalt is a chemical element with symbol Co and atomic number 27. It is found naturally only in chemically combined form. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Cobalt-based blue pigments have been used since ancient times for jewelry and paints, and to impart a distinctive blue tint to glass.
Enjoying the little and the not so little beautyful things and charming treasures life has in store for us and sharing what I am finding on my journey through this world and the internet. If you like my tumblr, you might like my blog Charming Quark too