Guard Byron:
Um...! What is it?... That beautiful stone? It looks like a really expensive stone... No, wait! Could it be...? Oh, oh... Isn't this a fairy stone? Yes, if you've got one of these, you may be able to attract a fairy. A fairy isn't easily seen by the human eye and can run away immediately when spoken to by a human. But a fairy will interact with a person having such a stone as this.
Ask in more detail.