It’s worth visiting the gallery des Bijoux if only to see the bracelet of American jeweler JAR (the initials of Joël Arthur Rosenthal). His pieces are rarely on view, except at auctions. The enigmatic JAR has no boutique and few clients: he only works for those he considers worthy of his creations. This silver and ruby camellia (1995) is a real masterpiece. JAR mixes materials with scant concern for their intrinsic value and captures the velvety and imperceptible movement of petals like no-one else. His delirious quest for perfection has today made him a paragon for jewelers and designers alike.