A Precious Pearl is an pearl that represents a continent.
The Pearls are mainly used as an ingredient to forge equipments, or to bring life to a Boss Pet.
These items are found in only in Champion Mode and 3-stars Very Hard, dropped by monsters at a low rate or a boss at a 100% rate. They only exist on Bermesiah, Ellia, Silver Land, Xenia, Alcubra , and Archimedia. These can also be acquired from some events, or bought with Hero's Bullions from completing a Hero Dungeon.