what major conflict occurs between kino and juana? why?

Juana believed the pearl to be evil and she wanted it destroyed, but Kino could see nothing but the money it would bring.

"This thing is evil," she cried harshly. "This pearl is like a sin! It will destroy us," and her voice rose shrilly. "Throw it away, Kino. Let us break it between stones. Let us bury it and forget the place. Let us throw it back into the sea. It has brought evil. Kino, my husband, it will destroy us."