What was the resolution of the pearl?

The pearl had caused greed and selfish behavior throughout the town; and, for Kino and Juana, it brought trouble wherever they were. In the end, Kino ends up killing a total of four people, and their baby son Coyotito is shot by one of the trackers (tracking Kino and Juana) when his cries are mistaken for a coyote. This is finally when Kino realizes that the pearl is too much of a curse to keep around, as Juana had previously warned him on more than one occasion. Kino throws the pearl back into the ocean and he and his wife watch it sink to the bottom of the ocean.