Georgian Blue John and Silver Urn

This important George III Blue John urn is attributed to famed Swedish architect Sir William Chambers. The solid piece is carved entirely from rare Blue John Derbyshire spar, taken from the now-extinct Blue John Cavern in Derbyshire, England. Set atop its Ashford marble plinth, the form is mounted with elaborate silver ornament, including scrolling foliage and grotesque masks. Blue John spar is a semi-precious mineral recognized by its beautiful radiating crystalline structure, which was only mined at a site near the village of Castleton in Derbyshire. Celebrated for its unique bands of blues, purples, and violets, Blue John was in great demand during the 18th and early 19th centuries. The colorful and decorative stone was even worked into columns in some of the finest houses in Great Britain, most notably Chatsworth, home of the Duchess of Devonshire. Due to its popularity, the largest veins of Blue John had disappeared by the early 19th century, and only a small amount of the stone