He won't ask; it is not his place to pry. Instead, he nods and just wants to tell the girls to help them with the search when Frigg dives down and picks the stone up, holding it high so the two men can see it. "This?"

Thorir's face shows a good hint of interest at the stone - he recognizes the form of the letters as runes and leans in lightly to see if he can read them, he's done his share of work with runes through his side business over the years. Runes are "cool" especially with people who get customized leather- and metal-works. But Killian's expression from before keeps him from reaching out for it.