For an exquisite engagement ring or a fantasy piece, Cartier is the place to go. This French jeweller is renowned for its immaculate taste and craftsmanship, as evident in its butter-soft leather goods as its jewellery and watches. Iconic designs, such as the ‘Tank’ watch and the peridot-eyed ‘Panthère’ cocktail ring, deserve their loyal international following: celebrity fans include Monica Bellucci and Kate Hudson.