Imperial State Crown
The modern version of the Imperial State Crown is of a design somewhat similar to that of St Edward's Crown, but shorter and encrusted with jewels: it includes a base of four crosses alternating with four fleurs-de-lis, above which are four half-arches surmounted by a cross. Inside is a purple velvet cap with an ermine border. The Imperial State Crown includes many precious gems, including 2,868 diamonds, 273 pearls, 17 sapphires, 11 emeralds, and 5 rubies.
The crown includes several famous jewels. The cross at the top is set with a stone known as St. Edward's Sapphire, a sapphire taken from the ring (or possibly coronet) of Edward the Confessor. The Black Prince's Ruby (actually a spinel) is set on the front cross pattée; the famous Cullinan II, or Lesser Star of Africa, is set on the front; and the back band contains the 104-carat (20.8 g) Stuart Sapphire. The crown also contains Queen Elizabeth’s Pearls.