How does rarity affect the value of jewelry?
This can have a major impact on the price of a piece of jewelry. Ask yourself, how likely would it be to find another. Especially rare pieces are usually one of a kind. They may have been by special commission; difficult to make for one reason or another; or contain an element not easily found or duplicated. Fabreg eggs come to mind. These were made primarily for the royal family, they were quite costly even at the time and would be difficult to duplicate.