 The ancient crown jewels of England were destroyed by Oliver Cromwell in 1649 when he established the Commonwealth of England.St Edward's Crown is the centrepiece of the coronation regalia, used at the moment of crowning and exchanged for the lighter Imperial State Crown, which is also worn at State Openings of Parliament.Among the precious stones on the crown are Cullinan II, the Stuart Sapphire, St Edward's Sapphire, and the Black Prince's Ruby (a spinel).