Made by Boucheron in 1919, this diadem was, like a notable number of pieces in the Royal Family’s possession, originally owned by Dame Margaret Greville. Mrs Greville, a close friend of Queen Mary & the Queen Mother, Elizabeth, left her jewellery collection to the latter on her death. When the Queen Mother died in 2002, it went to the Queen – but it’s delicate design really make it more suited to a Princess, so it was never worn by Her Majesty.
“It was made by Boucheron in 1919 for Mrs Greville and is made from platinum and pave set with rose cut and brilliant cut diamonds as well as six emerald cut emeralds either side of the centre, rubover set with the impressive 93.7cts cabochon cut emerald.
“In keeping with the fashion of the time, this Tiara was designed in the Russian headdress style, made of finely pierced platinum, which was kept delicately simple, although intricate in detail, to show off the main stone.
“Accompanying the centre emerald, are matching old step-cut emeralds, as well as ample pave set brilliant and rose cut diamonds. This piece is certainly exquisite; the centre emerald has a wonderfully vivid colour and large size, something which is rare to find these days.
“Being made by Boucheron, one of the great Parisian Jewellers founded in mid Victorian era, this makes this piece even more exciting as the quality of workmanship and gems will be second to none.
“With such strong historical provenance, from Mrs Greville to the Queen Mother, and now the Queen, an elegant jewel such as this would be estimated to fetch £5-10 million at auction.”
The Cartier Halo for instance, was worn by Kate Middleton on her wedding day to Prince William in 2011.
Similarly, the Meander tiara was admired around the world thanks to it being the choice of Zara Phillips for her wedding to Mike Tindall in 2011.
And it is the Lover’s Knot that is most often seen today, as it is a favourite of the Duchess of Cambridge.
It was closely associated with Diana, Princess of Wales during her marriage to Prince Charles, so holds special significance for Kate.