If the pendant of Avalokitesvara is crushed, you should repent and read Dharma Buddha and Dharma Buddha more to eliminate sins. Although the Bodhisattva is merciful, she won't blame you, but her sin is determined by personal karma, and she still has to repent.
In addition, the Buddhist scriptures say that all the broken Buddha and Bodhisattva statues are not as good as Buddhism, so you should not expose them to others. You should wrap them in clean cloth or paper and put them in a clean high place at home.