Franck send me this list:

From my own researches, the Queen owns or owned – and these are not quite the same things as some pieces have never been worn, while others were loaned to her when she was young by Queen Mother. My own list comprises on least

26 tiaras -maybe 30 see

74 pair of earrings,

293 brooches, including on least 186 brooches worn,

89 necklaces,

27 pearl necklaces, around 20 pearl necklaces worn by her Mother,

94 bracelets,

5 hair ornaments,

3 hair pins for hats,

6 pendants,

34 watches and

57 rings.

King George IV’s Diamond Diadem
Queen Adelaide’s Hanover Fringe Tiara
Queen Victoria’s Oriental Circlet
Queen Victoria’s Ruby, Lasque Diamond, & Pearl Tiara
Queen Alexandra’s Diamond Kokoshnik Tiara
Queen Mary’s Girls of Great Britain & Ireland Tiara The Queen
Queen Elizabeth, the Queen Mother’s Bracelet Bandeau Tiara
Queen Elizabeth, the Queen Mother’s Strathmore Rose Tiara
Queen Elizabeth II’s Brazilian Aquamarine Tiara
Queen Elizabeth II’s Burmese Ruby Tiara
Queen Elizabeth II’s Sapphire Tiara
Grand Duchess Maria Pavlovna of Russia’s Vladimir Bolin Pearl Drop Tiara

Owned by Queen Elizabeth II loaned to a family member

Queen Mary’s Delhi Durbar Tiara - Queen Consort Camilla
Duchess of Teck’s Crescent Tiara Queen Mother - Queen Consort Camilla
Dame Margaret Greville’s Honeycomb Tiara - Queen Consort Camilla
Queen Mary’s Lovers Knot Tiara - Princess of Wales
Queen Elizabeth II's Nizam of Hyderabad Diamond Tiara - Princess of Wales
Queen Elizabeth, the Queen Mother’s Halo Scroll Tiara - The Princess of Wales
Queen Elizabeth, the Queen Mother’s Lotus Flower Tiara -The  Princess of Wales
Countess of Wessex’s Anthemion Wedding Tiara - Countess of Wessex
Queen Elizabeth II’s Small Aquamarine Tiara - Countess of Wessex
Queen Elizabeth, the Queen Mother’s Double Meander Tiara - Princess Anne  
Queen Mary’s Diamond Bandeau Tiara - Duchess of Sussex  
Queen Mary’s Fringe Tiara - Princess Beatrice of York 
Dame Margaret Greville’s Emerald Tiara - Princess Eugenie  

Queen Mary’s Diamond Lozenge Tiara
Queen Mary’s Sapphire Bandeau Tiara
Queen Elizabeth, the Queen Mother’s Persian Turquoise Tiara