If Arpeggio got the same kind of cheats her sister did with Earth textbooks and science and then apply her specialty to Earth physics (basically the opposite of what Lelei is doing), I wouldn't be surprised if she could do something like modify minerals in a way that would be super valuable to Earth, but considered "pointless" on their homeworld.

Something like trivially make warm superconductors.

But no, Lelei is "special" and Arpeggio will be used to hunt for metals in the ground like a dowsing rod.