Third crowned portrait of HM Queen Elizabeth II facing right, wearing the George IV State Diadem.

The George IV State Diadem, officially the Diamond Diadem, is a type of crown that was made in 1820 for King George IV. The diadem is worn by queens and queens consort in procession to coronations and State Openings of Parliament. The piece of jewellery has been featured in paintings and on stamps and currency. It can be seen in the Queen's Gallery at Buckingham Palace.

ELIZABETH II DEI GRATIA REGINA FIDEI DEFENSATRIX means Elizabeth II, by the grace of God, Queen and Defender of the Faith.

Engraver: Raphael David Maklouf

A crowned lion (formally, Part of the crest of England, a lion passant guardant royally crowned), with the numeral "10" below the lion, and the value above the lion.

Engraver: Christopher Ironside

Varieties in thickness and edge milling exist: rounded (0,56 mm) or rectangular rim shoulder (0,99 mm).