Queen Camilla looked elegant on Tuesday as she debuted a rarely-seen tiara at a glittering diplomatic reception at Buckingham Palace.

The Queen joined King Charles and the Prince of Wales for the grand white-tie affair yesterday evening.

Camilla, who has been recovering from a chest infection, looked stunning in a blue velvet evening dress by Fiona Clare and opted for the late monarch’s small aquamarine and diamond tiara as she gathered with some 900 guests at the Diplomatic Corps reception….