Nader Shah's Shield
Nader Shah carried this shield into battle during this campaigns in India. It is assumed that the gems were added to it at a later date in his honor. His bow, which is still in the Golestan palace, bears no adornments other than a layer of varnish.
The shield is supposedly made of rhinoceros hide, and has a diameter of 46 cm. (18 in.). It is covered with spinels, emeralds, diamonds, and rubies. Even the edge of the shield, which is not visible in the picture, is studded with emeralds. The center spinel is one of the largest in the world, weighing 225 cts. The four emeralds surrounding the center spinel cover screw holes that attach straps to the back of the shield, allowing the Shah to securely hold it during battle.
The largest emerald on the shield weighs 140 cts. Most of the diamonds range from 6 to 8 cts.