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 a state crown of the Crown Jewels of the United Kingdom. It has existed in various forms since the 15th century and the present version was created in 1937. 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).