The large amethyst and diamond cross was sold from the estate of the late publisher and businessman Naim Attallah (1931-2021). The estimate was £80,000-120,000.
With premium, the price paid was £163,800.
According to Sotheby’s, Garrard lent Princess Diana the amethyst and diamond cross to wear with a purple and black velvet Catherine Walker & Co dress for a function held at the jewellers in support of Birthright.