Lady Gaga stepped out on the red carpet at the 2019 Oscars in a long black gown and gloves designed by Alexander McQueen, paired with the ultimate accessory to complete the look: the iconic Tiffany yellow Diamond, which weighs in at 128.54 carats. Discovered in South Africa in 1877, the diamond has an estimated worth of $30 million, and it was last worn by Audrey Hepburn in 1962 when she posed for the poster art for Breakfast at Tiffany’s.