I am going to say no, it would need to be replaced. Someone would have to match the stone or replace all three. I do not believe it can be repaired, it could be reset, ground into smaller cabochons but a crack would necessite replacement. You would lose karat weight so, in my opinion, not this website's, the lapis would need to be replaced. Asking a jeweler would not hurt, and he could give you options on matching or replacing the stone(s) in your bracelet.