Dua Lipa didn't just accessorize her Schiaparelli gown with vintage Tiffany & Co. jewelry. She accessorized ... featuring layered diamond necklaces and stacked diamond rings.

In its illustrious 179-year history, Tiffany & Co. has invited only a handful of designers to sign their names to its jewelry. The list—Jean Schlumberger, Elsa Peretti, Paloma Picasso ...