And there we have it!
Oh, it's no big deal. Claire just invented a way to break the laws of physics.
Or, well, find a loophole in the law and exploit it. Matter cannot be destroyed, but it can be converted into energy and energy can be converted into matter. It's an extremely inefficient process for something like this, at least based on our current understanding of physics, but...Claire figured it out. This might be the most "impossible sci-fi tech" thing in the comic, at least things that aren't affected by magic, but I actually don't think it's *too* impossible to be invented someday.
Gonna go out on a limb here and say that device she has might be worth more than that crate full of bullion.