Corrupted Gems

"All those monsters we fight used to be just like us!"

"Corrupted Gems" are former Gems who have become corrupted. One of the main missions of the Crystal Gems in protecting humanity is to defeat and contain corrupted Gem monsters and eventually cure them.

Most corrupted Gems are hostile and dangerous. However, much like normal Gems, when their bodies are badly damaged, they explode into smoke or poof, leaving their Gemstone behind. The Gemstone can then be safely contained in a Gem bubble, preventing it from regenerating.

Known corrupted gems

 * Centipeetle Mother
 * Ice Monster
 * Watermelon Tourmaline
 * Worm Monster
 * Gem Cave Creature
 * Invisible Gem Monster
 * Big Bird
 * Heaven Beetle
 * Earth Beetle
 * Lighthouse Gem Monster
 * Tardigrade Gem Monster
 * The Slinker
 * Crab Gem Monster
 * Desert Glass
 * Unknown Giant Gem Monster

Trivia

 * Pearl states in "Ocean Gem" that all the creatures they have battled/fought thus far are corrupted Gems.
 * This confirms that the form the Centipeetle Mother takes upon its release from the bubble is its human shape.
 * This also explains why these creatures have a gemstone, and have the ability to regenerate.
 * It is currently unknown as to what it is that caused other Gems to turn into these creatures, or how many there are currently on the planet.
 * The Centipeetle Mother is the only corrupted Gem shown to regenerate.
 * The Desert Glass is the only confirmed corrupted gem to not take on a monstrous form.
 * Corrupted Gems can be compared to the E.V.O.S. from the Cartoon Network show Generator Rex. E.V.O.S. and Corrupted Gems were originally a normal species but become mutated, turning them into mindless monsters, and both need to be cured.
 * It's unknown how many of the corrupted Gems are former Homeworld Gems and how many are former Crystal Gems.