>>123252737if you make a gem from substandard rock, they don't get all the fancy powers. that's why earth was slated for harvest, quality gemstone material.
Peridots are supposed to have if nothing else ferrokinesis, and guessing by the limb enhancers, probably be about twice the size assuming she's not overcooked like amythest.
Peridot didn't think she had ferrokinesis at all, and that's almost correct, the heaviest thing we ever see her lift, after tons of training, is a trashcan lid. Not all that useful for an engineer (effectively an ob-gyn for a race of grey goo-like planetary virus robots) meant to work on 150ft drill injectors.
But like, compare all the abilities we've seen Pearl do. She is literally intended to be a smartphone/handbag/maidservant. And she has an entire suite of magical abilities. Ruby is the closest thing to an expendable drone they have as a species. Still has several.
Meanwhile, the era 2 Peridot that we know has one, and barely has that. She can't even summon a weapon.
she's the gem equivalent of severely fetal malnutritioned. ironic, and seemingly acutely felt as she does her job based on some dialogue, knowing that every gem she's ever seeded is resigned to the same fate.