Crown Jewels will forever remain significant. Prime among these is the role they have played in shaping the history of their nations. Crowns are a respected symbol of those contributions and that is partly why everyone cherishes them. Another reason is that they are beautiful; and one more, they are very expensive.
However, their high value is unique in that nobody has the liberty to take them to a jewelry shop in exchange for cash: call them sacred. That however does not prevent you from comparing. Below is a list of the most expensive crown jewels of all time.