One can find many similarities between Kino and the pearl in John Steinbeck's novel The Pearl. Regardless of the many similarities, only one stands out above all others by the end of the novel.
At the end of the novel, both Kino and the pearl have changed dramatically. Each have undergone a major transformation. The pearl, no longer desired and now hated by Kino, has become "gray and ulcerous." Kino, similarly, is not the same person he was when he found the pearl. He has become a hated man, a murderer, and an outcast. In the end, when throwing the pearl into the ocean, Kino is trying to rid himself of the changes brought on by the pearl.
While he cannot bring back his son, Coyotito, Kino sees how the pearl has ruined his life. The thing which he thought would bring great fortune would, in actuality, lead to his ultimate downfall. Therefore, another similarity would be, the pearl's inability to change Kino's future for the best (in the same way that Kino (himself) could not change his future for the best either).