Y'know... given the right materials, I bet I could come up with a close approx--approximation of a gem. An artificial one. It'd be lab testing only, to mitigate some kind of psychotic fusion on a rampage, buuuut... data might be interesting.

[If he is worried Peridot may have some kind of moral objection to a lab-grown Gem "brain" used purely for experimentation, he doesn't mention it.]