Both are part of the Crown Jewels. Llywelyn's coronet was for a while kept with the English crown jewels. It is part of the British Crown Jewels. They were separate from the coronation and state regalia of the Crown Jewels. A Keeper of the Crown Jewels was appointed in 1207. The Stuart Sapphire is a blue sapphire that forms part of the British Crown Jewels. See Crown Jewels of the United Kingdom. It also led to the break-up and partial sale of the Crown Jewels. It is now located in the Grand Palace as part of the Crown jewels. It is on display with the other Crown Jewels at the Tower of London. Later her father returned it to the French Crown Jewels. There are items in the Crown Jewels made from Combe Martin silver. It has not been used since and is now a part of the Crown Jewels. The diamond is held in the Royal Palace as part of Thailand's crown jewels. The new production, titled "The Crown Jewels", was well received.