[He fidgets nervously but he does nod with a fleck of determination.]

I haven't made anything like crystals yet. But this might be a reason to try... The best I've gotten so far is glass. The glass I've been working on for lenses to work with.

[He reaches down to the ground and scoops up some fine dirt and pebbles. It isn't exactly sand but he's not making exactly glass right now. Right? He focuses.]

I'll just need a minute to try...