In order to make the battle between crown and power a unique symbol of power in the world, the royal families of all dynasties have tried their best to collect diamonds and jewels, believing that rare diamonds can best reflect the dignity of the royal family. Therefore, the process of collecting diamonds over the centuries has gradually formed the most famous family treasure in the world. The crowns worn by the early great kings and queens have been lost. The king and his relatives had to sell many treasures in order to wage war, rebuild the palace destroyed by fire and hold a royal wedding. In the Middle Ages, kings usually carried royal treasures with them in battle because they didn't trust their relatives who stayed in the palace. The anti-kingship movement that broke out in England from 65438 to 0648 had a great influence on the British royal family, and many precious crowns and power struggles were lost. 1660 after the restoration of the British royal family, a large-scale project to rebuild the crown and power began. Since then, many rare treasures have been preserved. With the development of the royal family, since the18th century, the British royal family has had specialized jewelers who have produced the most exquisite jewelry with extraordinary skills.