Peridot

"Peridot" is a Gem who made her first appearance in "Warp Tour". She a recurring antagonist, appearing in both "Warp Tour" and "Marble Madness".

Appearance
Peridot has neon green skin and eyes. Her light green fingers are not directly attached to her body, but instead float around where her hand should be. Peridot's hair is short, yellowish green, and styled into a tetrahedron shape. A light green visor covers half of her face. She wears a V-neck body suit that covers all of her body, except for her upper arms and neck. Her body suit is mainly composed of dark green and has a black diamond outline around the cut out of their neck area; meeting together to a light green diamond in front, with the lower half of her suit being black and dark green around her upper legs. Peridot's sleeves and boots are mostly composed of green and black as well. She has light green, diamond-shaped knees and elbow pads. Her gem is located on her forehead and is shaped like an inverted triangle with rounded edges.

Personality
Peridot seems to have a very Darwinian attitude towards her robots, as instead of helping a broken one, she merely crushed it without hesitation or mercy. She is very mindset on her missions. This is seen in "Marble Madness", where she nearly crushes Steven with a giant hand so that he doesn't get in the way of her mission. She also seems to be very technological and intelligent, as demonstrated when she was using very advanced terms and clearly knew how to use her holographic touchscreen when performing a "maintenance check" on Earth.

Abilities
All Gems can shape-shift, summon a weapon, and retreat to their gemstone to heal. In addition to the aforementioned abilites, Peridot is also able to detach her fingers from her body and project a holographic touchscreen from them.

Crystal Gems
Apparently, the Crystal Gems seem to not know who Peridot is, but they all, except Steven, seem to be afraid of her, as shown when they hid when she first appeared. It is unknown what relationship they have with her. Likewise, Peridot wasn't aware that any Gems remained on Earth.

Gemology
Learn about the peridot gemstone here.

Trivia

 * Peridot is the only known Gem not to have physical hands.
 * Peridot is the second non-fused Gem to be discovered, and not previously established in earlier episodes.
 * The first is Lapis Lazuli.
 * Peridot and Pearl both have their gems on their foreheads.
 * This possibly indicates their heightened intelligence.
 * She seems to have limited knowledge of Earth, as shown when she retreated from Earth when thinks that the Galaxy Warp was "compromised" after discovering a sticker on the warp pad.
 * Peridot is the birthstone of August, along with Sardonyx.
 * Peridot is the gem-quality Olivine mineral. The mineral olivine is a silicate, and its crystal structure is made up of single isolated tetrahedron crystals. This tetrahedron shape has the same shape of Peridot's hair.
 * Peridot doesn't have a star on her uniform. Instead, she has a diamond.
 * Lapis Lazuli also follows this trend.
 * This trend appears to occur on Gems that are not part of the Crystal Gems, who all have a star on their uniform.
 * This could be a hint to a different group of Gems.
 * This may hint a dispute between Gems with stars and Gems with diamonds. This is bolstered by the murals in the main room of the pyramid in "Serious Steven", where Rose Quartz (star on clothing) is fighting another Gem with a diamond on their clothing.
 * Although Pearl had a diamond on her space uniform in "Space Race", this has yet to be explained.
 * Based off of the loud pounding with each step she takes, it can be assumed that she has an unusually large mass, possibly due to their bio-technological getup.
 * Peridot managed to almost reactivate Kindergarten, but was eventually foiled by the Crystal Gems.
 * She appears to have an almost limitless supply and varieties of Flask Robonoids. She was able to deploy as many as she wants and at any size to Earth from space.
 * It is possible that the EMP device and possibly the Flask Robonoids are Peridot's "weapons". She was sent to reactivate a Kindergarten.
 * Right before the injured Flask Robonoid interrupted her, she was saying "Preparing to locate and manually activate Kindergarten".