Board Thread:General Discussion/@comment-25765284-20150502152544/@comment-26217701-20150502163718

Lapis Lazuli doesn't have gem tech. She's been stuck on Earth and Homeworld has advanced far beyond her knowledge. She does however have hydrokinesis.

And in regards to Peridot, I doubt it. She likely has a high grasp and influence on technology or some sort of technokinesis.