No Image Lot 205 BOODLE AND DUNTHORNE. An Amethyst and Diamond Cocktail Ring in 18k white gold, set with a large 205BOODLE AND DUNTHORNE. An Amethyst and Diamond Cocktail Ring in 18k white gold, set with a large Mayfair Auctions BOODLE AND DUNTHORNE. An Amethyst and Diamond Cocktail Ring in 18k white gold, set with a large mixed cut amethyst of approximately 45.00cts, acce... Add to watchlist Live