The Cambridge Lover's Knot Tiara (Queen Mary's)

The Cambridge Lover's Knot Tiara

This tiara was created for Queen Mary (it's also called Queen Mary's Lover's Knot Tiara) and inherited by the present Queen. She wore it earlier in her reign before loaning it to Diana, Princess of Wales. The tiara is now back in The Queen's vault and has been loaned to The Duchess of Cambridge, who debuted it in 2015.

Read more at Order of Splendor.

Appearances (all after 2015 on The Duchess of Cambridge; all prior on The Princess of Wales):
23 October 2018: State Visit from The Netherlands, State Banquet 
5 December 2017: Diplomatic Reception
12 July 2017: State Visit from Spain, State Banquet
8 December 2016: Diplomatic Reception 
8 December 2015: Diplomatic Reception
1982: State Visit from the Netherlands
1981, 1991: State Opening of Parliament