Jasper is a Homeworld gem who was sent to Earth under Yellow Diamond's orders. She was Peridot's escort but is now trapped under the sea by Lapis Lazuli in their fusion form, Malachite.

She is orange and wears an outfit with a similar style to Peridot's. She has darker orange/red stripes on her face and arms and her gem is where her nose would be. Her gem weapon is a crash helmet although she's also used a gem destabliser against the Crystal Gems.