In Irene's poems, do you use diamonds or stones to divine crystals?

Diamonds According to the introduction of the game, it is known that Aileen's poems use diamonds to divine crystals. Aileen's poem is a two-dimensional card game. In the game, players will enter the fantasy world named Irene continent for adventure. In this land full of unknowns and mysteries, players can explore six camps, gather or meet superior partners to form a mercenary group, and embark on the road against darkness together until dawn shines on Aileen's mainland again.