[Raine does take his hand, curious, and prods gingerly at the new gem, both physically and magically.]

How quickly did she heal-- could you tell? You didn't make any physical action toward her? Was there a mental shift in intent, or perhaps even wishful thinking regarding her injury?

[All important data points. In a moment she'll let his hand go, thinking.]

Where did you find it? It may be this is another of those things the Dreaming creates.