British singer and actress Rita Ora, who performed at the Oscars, wore yellow gold and diamond earrings by Lorraine Schwartz.

Foxcatcher’s Sienna Miller accessorized with a 40.79-carat diamond line bracelet set in 18-karat white gold, made by Forevermark by Leo Schachter.

E! host Jason Kennedy wore Jacob & Co.’s diamond watch while interviewing celebrities on the red carpet.

British singer and actress Rita Ora, who performed at the Oscars, wore yellow gold and diamond earrings by Lorraine Schwartz.

Laura Dern, who was nominated for Best Supporting Actress for her role in Wild, accessorized with Bulgari’s “Monete” necklace, made in white gold with sapphires, rubies and pave diamonds.

The Wolf of Wall Street’s Margot Robbie wore Van Cleef & Arpels “Zip Antique Colombine” necklace, made in 18-karat yellow gold with diamonds and sapphires.

If I Stay actress Chloe Grace Moretz wore these Forevermark diamond ear cuffs, made with 19.31 carats of round brilliant diamonds set in 18-karat rose gold.

Tom Cross, who won an Oscar for his editing of Whiplash, wore Jaeger-LeCoultre’s Grande Reverso Ultra Thin Tribute to 1931.

Actress and Oscar presenter Viola Davis donned the Van Cleef & Arpels “Valadon” necklace, which was made in 1973 and is 18-karat yellow gold with cultured pearls and diamonds. She also wore internally flawless diamond earrings set in 18-karat white gold.

Scarlett Johansson, who recently starred in Under the Skin, wore Piaget’s ear cuff, set in 18-karat pink gold with five pear-shaped emeralds, four pear-shaped aquamarines, two pear-shaped green tourmalines and 278 brilliant-cut diamonds.

Cate Blanchett, who voiced the character Valka in the Oscar-nominated animated film How to Train Your Dragon 2, wore Tiffany & Co.’s platinum necklace with turquoise, aquamarine and diamonds.

E! host Giuliana Rancic was dressed in Forevermark jewels for the Oscars, including these 6-carat double halo stud earrings with round brilliant Forevermark diamonds set in 18-karat white gold.

Reese Witherspoon, nominated for an Oscar for her role in Wild, donned Tiffany & Co.’s platinum cluster earrings, created with pear- and marquise-shaped diamonds.