Queen Elizabeth II decided to blow the cobwebs off one of her favourite diamond brooches in the Palace's official photograph to mark Prince Philip's 99th birthday.The Queen chose a sparkling diamond brooch with an 18.8-carat heart-shaped stone at its centre for the Duke of Edinburgh's official 99th birthday picture.The monarch picked the Cullinan V - one of her favourite pieces of jewellery - for the special celebratory portrait with her husband of more than 70 years at Windsor Castle.According to calculations made by the Daily Mail back in 2012, the diamond would have been worth around £9.4million eight years ago.She has worn it many times over the decades including to the wedding of her granddaughter Princess Eugenie, at London Fashion.
Read more on dailystar.co.uk