George IV State Diadem
The diadem features 4 crosses alternating with national emblems: roses (England), thistles (Scotland), and shamrocks (Ireland).
It is set with 1,333 diamonds and pearls.
It was created in 1820 for the coronation of King George IV.
The George IV State Diadem, also known as the Diamond Diadem, was created for King George IV's coronation in 1821 (though commissioned in 1820).
It was designed by the famous jewelers Rundell & Bridge.
Although originally made for a king, it has been worn exclusively by queens regnant and queen consorts since 1830.
Queen Adelaide, Queen Victoria, Queen Alexandra, Queen Mary, and Queen Elizabeth II all wore it regularly during their reigns.
Queen Elizabeth II famously wore it to the State Opening of Parliament.
This is also the exact crown she wears in her portraits featured on Commonwealth coins, banknotes, and postage stamps.
It is currently used by Queen Camilla.













