The Countess of Wessex wears her aquamarine necklace tiara at the wedding of Prince Carl Philip and Princess Sofia of Sweden, June 2015; read more about the tiara over here!

Queen Victoria of the United Kingdom wears her Regal Circlet in an illustration; the diamonds were removed from the piece in the 1930s and its empty frame now resides in the Museum of London, but some of the alternate elements may have been used to make the Countess of Wessex’s Wedding Tiara

Queen Victoria wears the George IV Diamond Diadem in this detail from a portrait; read more about the diadem over here!