Hmm...well, I'm not feeling anything magical coming off them. I guess there is only one way to find out...

[Diarmuid starts to open the bag, but pauses to grin back at Waver.]

If I get turned into a rabbit, I am going to twitch my nose at you angrily. Just a warning.

[He laughs and then turns back to the bag to open it. Fortunately, there is no magical poof.]

They are runestones. It looks like you must have given divination at try at some point. Or just got them because you thought they looked neat...