Christian Dior got a big dollop of wit and panache when it signed on young designer Victoire de Castellane to create Dior's first line of fine jewelry. She does oversize flowerlike rings, hoop earrings, and bracelets swinging with diamonds, and -- lest you forget the amped-up spirit in the Dior house -- white-gold death's-head cufflinks. Métro: Franklin-D.-Roosevelt. Other location: 8 pl. Vendôme, 1, Opéra/Grands Boulevards, PHONE: 01-42-96-30-84; Métro: Opéra.