Misc: Most gemstones contain several elements. Except the diamond which is all what?

Questions

Which character is the narrator of Melville's Moby Dick?

Musically, who described herself as 'The Last of the Red Hot Mommas'?

Singer Sarah Brightman was the second wife of which composer?

The RAF Red.Arrows have used British Aerospace Hawks since 1980. Which aircraft did they use prior to this date?

In legend, who was the Roman goddess of war?