Imperial State Crown

Imperial State Crown
Illustration of the Imperial State Crown published in 1919, digitally altered to resemble its current appearance
Details
Country	United Kingdom
Made	1937
Owner	King Charles III in right of the Crown[1]
Weight	1.06 kg (2.3 lb)
Arches	2 (four half-arches)
Material	Gold, silver, platinum
Cap	Velvet trimmed with ermine
Notable stones	Cullinan II, St Edward's Sapphire, Black Prince's Ruby, Stuart Sapphire

The Imperial State Crown is one of the Crown Jewels of the United Kingdom and symbolises the sovereignty of the British monarch. It has existed in various forms since the 15th century. The 1937 version is worn by a new monarch for the first time in the royal procession following their coronation (having been crowned with St Edward's Crown during the ceremony) and subsequently used at State Openings of Parliament. The crown is adorned with 3,170 precious stones, including the Cullinan II diamond, St Edward's Sapphire, the Stuart Sapphire, and the Black Prince's Ruby (a spinel).