Cobalt is a transition metal that is brittle and hard and has magnetic properties very similar to iron. Cobalt resembles iron in both its combined and individual states; it has very similar strength, thermal properties and electrochemical behavior. The latent heat of fusion is 259.4 J/g, and the latent heat of vaporization is 6276 J/g. At room temperature the crystal form of cobalt is hexagonal close packed, yet above 783 degrees Fahrenheit the face-centered cubic is the stable structure. The cobalt salts give glass a very deep blue color.        

(Obtained from Chemical Element.com)