what happens on the beach? What happens to the pearl?

A few things happen on the beach in chapter 5. Kino senses movement near him, but it is only Juana who arises silently from beside him. Kino sees her near the hanging box where Coyotito lay, and then watches her go out the doorway. Kino begins to feel a great sense of rage as he hears her footsteps going toward the shore; Juana is going to throw the pearl back into the ocean. Kino chases Juana, then strikes her in the face with his clenched fist and kicks her in the side. He then turns away from her and walks up the beach. While walking on the beach, men accost Kino in search of the pearl, which is knocked from his hand and lands on the pathway. Juana soon sees Kino limping toward her with a stranger whose throat has been slit.