Demi Moore's Armani Privé gown could've counted as a jewelry piece. But the actress took it further with a set of 18k white gold 17-carat diamond earrings by Chopard. She also sported a bracelet ...

and ring featuring a 13.56-carat cultured pearl and diamonds set in 18K rose gold Dior Fine Jewelry Dior Délicat necklace in white and yellow gold with diamonds and yellow diamonds Graff white ...

Getty Images Covered in more than 80 carats of diamonds, Scarlett Johansson sported jewelry by De Beers. The actress paired her Mugler gown with the De Beers "Midnight Aura" 74-carat diamond necklace ...