Limb Enhancers

The Limb Enhancers are mechanical tools crafted on the Gem Homeworld and given to Era 2 Gems who lack powers.

They were formerly worn by Peridot ,and are now worn by Jade. He wears them throughout every episode, and we know they are separate from his body and Jade himself confirmed them to be separate body parts from his physical form in the episode "Where's My Court?".

Arm Attachments
The arms can create a tractor beam (used to levitate broken Warp Pad pieces, and other Gems), and also fire blasts of plasma.

Fingers
The fingers can create a screen, shaped by four fingers and operated with one. This can be used to operate machinery such as the Gem Warship by tracing different lines on the screen. The fingers also can generate jolts of electricity, and were also seen to rotate as helicopter blades. The touchpad can interface with Gem technology, including Warp Pad status, the Plug Robonoid which Jade has not learned to utilize yet, remote Gem Warship operation, and for several uses in the Kindergarten. In "Bubbled", Jade says that his screen had information from multiple different star systems. It is currently unknown how the fingers were able to float independently from the limb enhancers. Notable is that the inactivated fingers do not levitate in their last appearance, suggesting that the user must be in control of the limb enhancer to utilize their independent functions.

Legs
The legs increased Jade's height, but appear to have had no other abilities.

Feet
In an emergency, the feet can be separated from the legs by pressing on the side of the foot. Peridot ejected her left foot during her escape in "Friend Ship". Peridot and also Jade are able to scale vertical walls with relative ease when using her feet enhancers, as she ran straight up a wall in the Kindergarten in "Keeping it Together".