Peridot

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

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
Thus far, Peridot has been shown to be cold and machiavellian. She appears to be some sort of scout or technician, and takes her work seriously, crushing one of her Flask Robonoids when it became damaged in her first appearance in "Warp Tour". In "Marble Madness", she shows herself to be slightly arrogant and does not have a high opinion of humans, and attempts to crush Steven with a giant hand after briefly questioning him. She is also somewhat like Pearl, in that they're both very intelligent and become easily flustered when their plans fail. When Peridot realized that the Crystal Gems were the ones that have been destroying her equipment, she quickly lost her temper and asked "Why do you keep destroying my things!?"

Peridot also seems to be very naive when it comes to Earth, especially when the information is not important to the mission, such as assuming that Steven's Crying Breakfast Friends sticker was a sign to show that the Galaxy Warp had been compromised. She also believed that, while interrogating Steven, there were a species called "Stevens", just because he addressed himself by his name.

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.

She is also shown to be intelligent enough to use and manipulate advanced Gem technology to reactivate the Kindergarten and fight the Crystal Gems.

Crystal Gems
Apparently, the Crystal Gems don't know who Peridot is. But they all (except Steven) seem to be afraid of her (as shown when they hid from her on "Warp Tour" and "Marble Madness"). Likewise, Peridot wasn't aware that any Gems remained on Earth, much less the Crystal Gems, as she was quite shocked to find them still alive. In "The Message", Lapis Lazuli told the Crystal Gems that a gem with advanced technology (whom Pearl assumes to be Peridot) would be bringing an army to Earth and that they should surrender as it would be much easier.

Steven
When Peridot first saw Steven in "Marble Madness" she thought it was a infestation of "Stevens" in the Kindergarten. Peridot then briefly questioned Steven. After Steven asked her one, she was going to crush him. It is shown that she is arrogant to Steven. Also, in "The Message" Lapis Lazuli said that Peridot was coming to Earth for the Crystal Gems.

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.
 * This is supported by the fact that she has no clue of what has happened on Earth in the past 6000 years.
 * 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 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 depicted 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 her bio-technological getup.
 * Peridot almost managed to reactivate the Kindergarten, but was foiled by the Crystal Gems.
 * She appears to have an almost limitless supply and variety of Flask Robonoids. She was able to deploy as many as she wanted and at any size to Earth from space.
 * Her final words before her screen faded out were "I'm reporting this!" Implying that she has a supervisor. It also implies that other Gems besides her, the Crystal Gems and Lapis Lazuli are still out there and she will return.
 * This was confirmed in The Message when Lapis Lazuli warns the Crystal Gems that Peridot is leading a number of other Gems to Earth.
 * It is possible that the EMP device and possibly the Flask Robonoids are Peridot's "weapons".
 * 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 shapehas the same shape as Peridot's hair.
 * Peridot is the birthstone of August, along with Sardonyx.
 * Lapis Lazuli, who has so far been the most powerful gem on the show, seems to be afraid of her, implying that Peridot is an extremely dangerous gem.
 * The peridot gemstone is one the oldest known gems and dates back thousands of years. Considering Peridot has known about Earth for at least 6,000 years, this is fitting. In addition, peridots are also a cleaning gem. Peridot, in her second appearance, tried to kill Steven because she though he was a pest. She also fled from the warp pads in her first appearance when she saw the crying waffle sticker left by Steven because she thought the site had been compromised. To cover her tracks, she destroyed the Robonoids.