"Was I unclear-?" Peridot starts to respond. Then she just boggles. This person really has no idea what a gem is or what it means or really anything that Peridot is talking about. She blinks and then tries to say so many things at once.

"What am I?" Peridot laughs, "I'm a gem!"

She gestures at her gem, sounding incredibly smug, as only Peridot really can, "My body is just a solid, holographic projection that allows me to interface effectively with the rest of the world. The gem is the important part - if my 'body' is damaged, I can just regenerate!"