The French-American sculptor Niki de Saint Phalle (1930-2002) started making jewellery in the early 1970s after she was introduced to the Italian goldsmith Giancarlo Montebello in Paris.

This ‘superb’ rose ryal, produced during the third coinage of James I in 1619-20, sold for £34,000 at Baldwin’s of St James (20% buyer’s premium).