2019-6-28 · Some of the grandest royal tiaras ever worn and the stories behind them. By Annabelle Spranklen and Luciana Bellini. 24 Oct 2018. The Cambridge Lovers' Knot Tiara. In 1913 Queen Mary commissioned Garrard to create this tiara, based on a design worn by her grandmother, Princess Augusta of Hesse, otherwise known as the Duchess of Cambridge. It ...