Cobalt is a hard, lustrous, silver-gray metal that is naturally ferromagnetic and is produced via reductive smelting from chemically combined forms it is found in, in the earth’s crust. For centuries, cobalt-based blue pigments (cobalt blue) have been used in jewellery, glassware, and paints. Today, cobalt is used primarily for the manufacture of magnetic, wear-resistant and high-strength alloys. Its compounds (such as cobalt silicate or cobalt(II) aluminate) continue to be used to give the element’s distinctive deep blue colour to glass, ceramics, inks, paints, and varnishes.
- Manufacture of magnetic and wear-resistant alloys
- Pigments for glass, ceramics, paints and inks
- Thin film coatings on surfaces