The Times 21 April 1855 recorded the jewels worn by Queen Victoria and the Empress at a concert at Buckingham Palace on the previous evening as
Does any one know what the Empress was wearing?
I presume that Queen Victoria was wearing the ruby tiara which she later gave to Princess Beatrice.
Edit: I am not sure but I think this is the tiara in question although, if so, then Winterhalter has taken some artistic licence. Or perhaps Queen Victoria had some alterations made.