The Stewart Sapphire, which had been owned by the Royal House of Scotland for centuries, was given to George III. The original owner of the sapphire was reputed to have been King Alexander II of Scotland, who had it set in the crown for his coronation in
The crown of Queen Alexandra was a new consort crown, whose style was more akin to the European royal crowns, than the standard style of the British crowns. The arches were detachable, which like the crown of Queen Elizabeth, meant the crown could be worn
The crown of Queen Elizabeth the Queen Mother, with the famous Koh-I-Noor diamond. This crown was made in 1937 for the coronation of Elizabeth (Bowes-Lyon) and her husband, King George VI of Great Britain.
Edwards Crown - Anne Boleyn is the only consort, before or since, to have been crowned with the St Edward crown, which is reserved for the actual monarch. I know she was crowned as a regent would have been.