Robbie wore Elizabeth Taylor’s famed Taj Mahal necklace, created by Cartier, and gifted to Taylor by Richard Burton on her 40th birthday in 1972. Variety // Getty Images Robbie at the premiere. Henny Ray Abrams // Getty Images The heart-shaped Taj Mahal Diamond. In turn, the auction house wanted the Elizabeth Taylor estate to return the proceeds, and they did not. After the subsequent legal disputes between Christie’s and Taylor’s estate, it is still owned and held by the estate.