Miss Spink gave her "a stone with a hole [that] went all the way through the middle of [it]. This stone helped her see through all things that were hidden by the "Other Mother".
Explanation:
Neil Gaiman's novella "Coraline" evolves around the story of Coraline and the parallel universe she discovered in her new home. And in that parallel universe, she has to fight an evil "Other Mother", the parallel character of her mother in the other universe, if she wants to keep her family safe.
Miss Spink was another tenant in the same building as Coraline and her family. When reading the tea leaves from Coraline's teacup, Miss Spink and Miss Forcible revealed that she is in danger. Miss Spink then gave her a <em>"stone with a hole [that] went all the way through the middle of the stone"</em>. The stone that Miss Spink gave her was to help keep her safe from danger. And this stone helped her see through things, unmasking everything hidden by the "Other Mother".
