I believe these diamond clips are the ones that fit into the tiara, given to Princess Alice, Duchess of Gloucester by her bridegroom in 1935. They are interchangeable with emerald clips. Birgitte, D of G also wears a ruby set but I`m not sure if these are different or also fit the tiara? The tiara showing the clips set in it. Birgitte, Duchess of Gloucester wearing them with the emeralds in 2004.
The ones with rubies, also worn recently at the Trooping of the Colour Parade.
I`m not sure when this one was taken, diamonds again. : : : :