"Hope" weighs 45.42 carats, is dark blue, and is a world-famous treasure.

Its name is hope, but it always brings bad luck.

Metaphysics believes that things like jewelry and diamonds are always accompanied by murder and robbery, and they are ominous things stained with blood. As for this doomsday diamond, it is said that its owners died mysteriously one after another until it was donated to the Smithsonian Institution.

In A.D. 1642, French explorer and jeweler Tavimir brought the gems back to France and presented them to King Louis XIV of France. Tavimir's property was completely spent by his unfilial son, leaving him penniless at the age of 80 and still going to India again, hoping to seek new wealth. However, he was killed by wild dogs there.

Louis XIV wore it only once and soon died of smallpox. King Louis XV of France became the new owner of diamonds. He swore not to wear this big dark blue diamond, but he lent it to his mistress. As a result, Louis XV's mistress was beheaded in the French Revolution. This big blue diamond was passed on to Louis XVI of France, and his queen often wore it. As a result, Louis XVI and his wife were both guillotined.