A gilt bronze cast of the crown of George IV. The crown is surmounted by a monde and cross pattée above four half arches springing from four crosses, cast with oak leaves and acorns, interspersed with fleurs de lis and a circlet of foliage; with a purple velvet and ermine cap. The crown has a circular gilt-wood base with a glass dome and blue velvet cover Within the monde of the model is a parchment note giving details of its creation. It was cast from George IV's Imperial State Crown or Diamond Crown, supplied by Rundell's for the coronation of 1821.The crown contained an extraordinary 12,314 diamonds. Although the frame of the original survives among the Crown Jewels, the stones were hired only for the coronation ceremony and were later removed from it. This model therefore gives the full impression of how it would have appeared.