What does Osman give Dottie on her seventeenth birthday in the novel, The Woman Who Lost Her Soul?

At her seventeenth birthday party in Book III, Osman gives Dottie a bracelet of blue stones that he says will ward off the evil eye – in other words, that will protect her from harm. It quickly, almost immediately, becomes her most precious possession, as she keeps it with her throughout the rest of her life.