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22. Celebrating Her Birthday With Favorite Jewelry
Blue is definitely the Queen's color, where she is looking stylish on her 90th birthday, which she celebrated with Derby Day. To commemorate the special day, she pinned on her Cullinan V brooch, which has a heart-shaped 18.8 carat diamond right in the center of it.

The massive diamond was originally a gift from the South African government to Queen Mary, and the Queen received it as part of her inheritance from her grandmother. It's actually one of her most favorite brooches - she wears it very often!