The State Crown of George I, used to crown George I, George II, George III and William IV. (George IV had a new diamond crown made for his coronation.) Detail from a portrait of King George I by Sir Godfrey Kneller, 1716.
The royal jewelry is never sold, it is simply passed down from generation to generation. Here, Queen Alexandra is seen in the pearls and diamonds that she passed down to her daughter in law, the future Queen Mary.