Imperial State Crown weighs 91 kilograms. Due to the weight of the crown, it is often worn on and off for a few hours before the State Opening of Parliament, to get the wearer used to the weight. Queen Elizabeth II has been known to eat her breakfast and read the morning papers wearing it.
Russian Imperial Throne of Tsarina Elizabeth Petronva was created in 1742. This Throne was part of Renaissance Culture as all as Part of the Tsar's treasury. The Ivory throne's ornamental design relates to the Imperial Caucasus Egg as well as the gold and red colour similarities and the materials that are used that is consisted of rubies, pearls and gold.
Tercentenary of Romanoff's House Egg, 1913. Presented by Nicholas II to Czarina Alexandra Fyodorovna. Vari-colored gold, silver, steel, portrait diamonds, rose-cut diamonds, turquoise, rock crystal, purpurine, ivory. Kept in Kremlin Armoury Museum, Moscow.