Minor Characters/Corrupted Gems

Minor Corrupted Gem Characters are Corrupted Gems who have debuted and been identified, but, as of yet, hold no significant nor recurring roles.

Centipeetle's Crew
Centipeetle's Crew are corrupted gems that appear in "Monster Reunion". They have been waiting for the Centipeetle Mother, because they didn't want to leave her behind. As of now, they live together in the Ancient Gem Colony Ship.

Green Great North Monster
The Green Great North Monster is a corrupted quartz gem that appeared in the episode "Gem Hunt". It is a mix of blue colors, with pink spots across its body, resembling a mixed jasper stone. Both it and the Orange Great North Monster were captured by Jasper and used in an attempt to attack the Crystal Gems during "Crack the Whip". In "Earthlings", Jasper attempted to force a fusion with it, but it ended the fusion and fled from a desperate Jasper. It is currently loose somewhere near the Beta Kindergarten. Though its original uncorrupted form is unknown, Jasper believed it (and by extension the similar Orange Great North Monster) to be a Quartz Gem like herself.

Orange Great North Monster
The Orange Great North Monster is a corrupted quartz gem that appeared in the episode "Gem Hunt". It is a mix of orange and brown colors with a layered pattern across its body, resembling a brown jasper. Both it and the Green Great North Monster were captured by Jasper and used in an attempt to attack the Crystal Gems during "Crack the Whip". It is currently bubbled after being poofed by Amethyst. Due to its similarities to the Green Great North Monster it may have been a quartz.

Ice Monster
The Ice Monster is a Gem Monster that first appeared in "Monster Buddies." It possesses a bulky body that is colored varying icy shades of blue. The creature also possesses two, very large arms with four spiky fingers each and two short legs. Its head is carved into five, sharp protrusions. It has two dark, hexagonal eyes and a gaping, dark mouth lined with sharp teeth. This monster is slightly taller than Garnet.

In "Monster Buddies," The Crystal Gems are shown fighting this monster in a large cavern inside a snowy mountain. This monster is shown to be preventing them from acquiring a powerful, elemental artifact called the Shooting Star. After its arm falls off, Garnet deals the final blow on it, thus, defeating the monster. Pearl bubbles its gem and transports it back to the Burning Room.

The Ice Monster, as well as a stronger version of the Ice Monster, appear as antagonists in the Steven Universe flash game, "Sword Dancers".

Water Bear
The Water Bear is a corrupted Gem that made its debut in "Love Letters." It was later captured by Jasper in "Earthlings" The Water Bear has a light-blue, barrel-shaped body with three similarly colored pairs of short stubby legs on its sides. Each leg is equipped with four finger-like appendages. Its entire body mass, aside from its gemstone, is composed of a gelatinous substance. Its gemstone is located in its face and resembles a single eye.

Crab Gem Monster
The Crab Gem Monster is a corrupted Gem that first appeared in "Rising Tides, Crashing Skies." It resembles a large crab. It has two large claws and six legs. On the top of its head, it has four small horns and in the center is one large spike. It has only one eyeball, and its iris appears to be the gemstone. Because it's only seen through Ronaldo's night vision camera, the actual color is unknown, but in the palette we see, it appears to be a dark teal color. It could be orange and white, just like its minions. It has two small pincers at its front, which is its mouth. The crab gem monster can create smaller crab monsters, one of which pinched Ronaldo before the main monster was introduced.

Small Crab Monsters
The Small Crab Monsters are creatures that debuted in "Rising Tides, Crashing Skies." The Crab Monsters look like normal crabs. They are orange and white. They have two claws and six legs. They have one spike at the top of their heads. They have only one eye just like the Crab Gem Monster.

They only appear twice in the episode. First when Ronaldo is recreating the Gem Warship crashing, one pinches Ronaldo's hand. The second time is when the Crystal Gems are fighting the Crab Gem Monster. It is unknown what happened to them after the Crab Gem Monster was poofed.

Earth Beetle
The Earth Beetle is a corrupted gem that makes its first appearance in "Giant Woman". Garnet had found it while Steven, Pearl, and Amethyst searched for the Heaven Beetle.

The Earth Beetle's figure somewhat looks like that of a Japanese Rhinoceros Beetle. The Earth Beetle's femurs are black, and the lower half of its legs are black. Its body is mostly a lightish-gray, but has a pale green gem on the top center of its body which is surrounded by a clover shape that is dark gray. It also has a black horn, black eyes, and black antlers.

Trivia

 * The Water Bear seems to be based on a tardigrade.
 * Tardigrades can live for a long time without nourishment, usually up to 30 years. They are also extremely durable as they can survive in the vacuum of space by entering a state of suspended animation.
 * Another name for tardigrades is "Water Bears."
 * The Crab Gem Monster, as well as the Small Crab Monsters, resemble Gohma from the Zelda series, particularly in how it seems to use its claws to help protect its eye, which is its weak spot, and its ability to spawn smaller versions of itself.
 * The Earth Beetle, along with the Heaven Beetle, are collectively known as "The Geode Beetles of Heaven and Earth".
 * The Earth Beetle appears in the desktop game "Goat Guardian" as a power up that lets Steven jump twice, instead of once.
 * It was confirmed that the Earth Beetle, along with the Heaven Beetle, are corrupted Gems.
 * The Heaven Beetle appears to have a gemstone identical to the Earth Beetle's.
 * The design of the Heaven and Earth beetles resembles the real life practice of live insect jewelry.
 * It and the Heaven Beetle are the only corrupted Gems that are shown bubbled without being poofed first.
 * Due to their similar appearance, is can be inferred that they're within the same gem type.
 * Both the Green and Orange Great Northern Monsters resemble each other, indicating that they may be same type of Gem. They are also shown to resemble the Corrupted Jasper, and Jasper believed them to be Quartz Gems like herself. However, it is unknown if this resemblance to Jasper's Corrupted form is due to being them being Quartz Gems like Jasper or if the similarities are due to Jasper's corruption originating from her fusion with the Green Great Northern Monster.
 * The Green Great Northern Monster is the first Corrupted Gem to fuse with a non-corrupted gem (Jasper).