HRM is wearing the Imperial State Crown of Great Britain, which incorporates the "Black Prince's Ruby", a 140ct. Badakhshan spinel. The crown was modified for Queen Elizabeth II prior to the 1953 coronation.
Happy 87th Birthday to Her Majesty, Queen Elizabeth II - 21 April My mom's name is Elizabeth and she's my queen<3 and she's born April 15th!! Pretty darn close and she exhibits her powers to my dad already ;). Love this photo for her highness.