The Rise of the Jewel Saint Villainess

Eliza, the daughter of a duke, has collected a huge amount of jewels and is hated by the people as a "jewel-eating villain." When she called the national treasure tiara she was crowned with at her wedding to her unfaithful fiancé, Prince Marquis, "garbage," the prince broke off their engagement and ordered her to be exiled from the country. Then, the crown prince of a neighboring country offered to take Eliza back with him. In fact, Eliza has an exceptional eye for jewels. It seems that the national treasure that she called "garbage" hides a secret... The villain knows all!?