Bon Ton Necklace in 18k Rose Gold with London Blue Topaz and Diamonds. The five-petals flower represents the icon of the Maison and evokes a woman with an elegant, harmonious and sophisticated lifestyle. London Blue Topaz is intense and seductive. The most fascinating of blues is a symbol of strength, appeal and power. The Bon Ton collection, whose symbol is this very flower, has adapted, alongside women, to the changing times and society, without sacrificing the simplicity and the innate grace of its emblem. The stones’ patented ‘Bon Ton cut’ features soft faceted petals culminating in a cabochon pistil at the heart of the jewel.