Crown of St. Stephen used to crown Hungarian Kings
A coronation crown is a crown used by a monarch when being crowned. In some monarchies, monarchs have or had a number of crowns for different occasions, such as a coronation crown for the moment of coronation and a state crown for general usage in state ceremonial.
St. Edward's Crown - traditional English then British coronation crown. The current St. Edward's Crown has been used a number of coronations since the restoration of the monarchy in 1660, but not, in fact the majority. The monarchs crowned with St. Edward's Crown were Charles II (1661), James II (1685), William III (1689), George V (1911), George VI (1937) and Elizabeth II (1953). King Edward VII intended to be crowned with St. Edward's Crown but in the event used instead the lighter Imperial State Crown (St Edward's Crown being judged too heavy for the King to wear soon after his illness).
Imperial Crown of Russia - the Great Imperial Crown of Russia, designed by Jérémie Pauzié in 1762 for the coronation of Catherine the Great. Inspired by the Byzantine Empire design, the crown was constructed of two gold and silver half spheres, representing the eastern and western Roman empires, divided by a foliate garland and fastened with a low hoop. The crown contains 75 pearls and 4,936 Indian diamonds forming laurel and oak leaves, the symbols of power and strength, and is surmounted by a 398.62 carat ruby spinel, that previously belonged to the Empress Elizabeth, and a diamond cross.
The crown was produced in a record two months and weighted only 2.3kg.  From 1762, the crown created by Jérémie Pauzié was the coronation crown of all Romanov emperors, till the monarchy’s abolition and the death of last Romanov, Nikolas II in 1918. It is considered to be one of the main treasures of the Romanov dynasty, and is now on display in the Moscow Kremlin Armoury Museum in Russia.