Before Prince Philip proposed to Queen Elizabeth in 1946, he commissioned Philip Antrobus to design and manufacture her platinum and diamond engagement ring using diamonds that were taken from a tiara worn by his mother, Princess Andrew of Greece and Denmark.
The exquisite design features a three carat brilliant cut diamond as the center stone set in an eight claw coronet setting. The ring, which now has an estimated value of $144,000, also has four brilliant cut diamonds on each shoulder.
Philip, who met Elizabeth when she was just 13 years old, at the wedding of his cousin Princess Marina of Greece, propose to her during a walk around the family estate in Balmoral during the summer of 1946. And while Elizabeth immediately said yes, her father later insisted that she kept their engagement a secret until she turned 21 the following year.
The couple married on November 20, 1947 at Westminster Abbey in London with 2,000 guests invited to their royal wedding.