Tiara belonging to Queen Geraldine of Albania. Yes, that is a diamond goat. I had never heard of Queen Geraldine, so I don't know whether a goat was a symbol of her agrarian country or a personal whimsey.
Marquis of Anglesey diamond tiara (1959 Christie's & DeBeers "Ageless Diamond" exhibit). On the hunt for color / higher quality images, this is an interesting | http://awesome-diamonds-gallery.blogspot.com