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|This article is about Unknown Gems. You may be looking for Minor Gem Characters.|
In Steven and Jamie's play, "Beach City or Bust", props for a Crystal Gem fusion and Corrupted Gem Monster can be seen. Not strongly resembling any other fusions, this is a fusion between some (or all) of the Crystal Gems. This fusion fights off a Corrupted Gem resembling both the Centipeetle Mother and the Big Bird.
There are many unknown Gems (represented in silhouettes during Garnet's flashback) in "The Answer". These Gems make up Blue Diamond's court.
|Image||Color||Gemstone (Shape, Location)||Other Info|
|Dark Burgundy||Oval; Right Elbow||She has a head shape similar to that of Topaz.|
|Teal||Tear Drop; Chest||She has pointy hair and a knee length dress. Her outfit and gem shape resemble Aquamarine's.|
|Sky Blue||Tear Drop; Chest||Her hair and gemstone placement are similar to that of Yellow Diamond. However, her dress, gem cut, and color in the picture are different. She also resembles an unknown Gem that appeared in "Cheeseburger Backpack".|
|Deep Blue||Tear Drop; Back||Her body, hair, outfit, gemstone, and gemstone placement are extremely similar to that of Lapis Lazuli, presumably being of the same Gem type.|
|Blue||Unknown||She has a broken knee length dress. Details about her body, hair, and gemstone are unknown.|
|Cerulean||Rectangle; Collar||She has poofy hair in a bun, and she is wearing a dress. She is very similar to another unknown Gem that appeared in "Cheeseburger Backpack"|
|Gray-Blue (Initially Navy Blue)||Upside-Down Tear Drop; Chest||Her hair is similar to that of Dr. Maheswaran, and is also similar to an unknown Gem seen in "Cheeseburger Backpack".|
|Light Pink||Hexagon; Navel||Her hair is similar to that of Rainbow Quartz and she has a pointy nose; this unknown Gem is very similar to one seen in "Cheeseburger Backpack".|
|Pink||Square; Navel||Her hair resembles an upside-down comma, similar to that of the defending Zircon.|
|Burgundy||Rhombus; Right Eye||Her body, hair and gemstone shape are extremely similar to that of a quartz.|
|Pink||Rhombus; Right Eye||Her body, hair and gemstone shape are extremely similar to that of a quartz.|
|Burgundy||Circle; Chest||She is bald and very bulky, muscular, and large. She was poofed by Pearl. Her gem shape and physique bear resemblance to Topaz.|
|Hot Pink||Circle; Chest||She is bald and very bulky, muscular, and large. She was poofed by Pearl. Her gem shape and physique bear resemblance to Topaz.|
|Carnation Pink||Circle; Chest||Her hair is in a pointed "swoop", and she is wearing a robe.|
|Lavender||Unknown||Her hair is similar to that of Padparadscha and is the only Gem whose silhouette does not contain defined hips and hands. Her gemstone's shape and location are currently unknown.|
|Mauve||Oval; Left Elbow||She has hair pointed to the left and a muscular build similar to that of a Quartz. Her hair, however, is very short, a characteristic not yet seen in any Quartzes except "Skinny" Jasper (and Amethyst in Greg's flashback in "We Need to Talk").|
|Salmon||Oval; Chest||She has hair in two buns. Her body shape is similar to that of Garnet.|
|Lavender||Triangle; Chest||Her hair is pointed in two triangular buns and is wearing a floor length dress. This gem (except her gemstone's cut) bears a strong resemblance to that of Holly Blue Agate.|
There are a few unknown Gems featured in Lapis' flashback.
There are a few unknown Gems featured in Centipeetle Mother (Nephrite's) flashback.
Nephrite, upon being briefly uncorrupted in "Legs From Here to Homeworld", mentions her Hessonite commander.
These are the "other Crystal Gems" who were mentioned by Bismuth, except for Nephrite, who is most likely a Homeworld Gem. They appear to be her close friends. Their statuses and physical appearances are unknown.
- "Crazy Lace" - A former Crystal Gem mentioned by Bismuth. She is presumably a Crazy Lace Agate.
- "Snowflake" - A former Crystal Gem mentioned by Bismuth. She may be a Snowflake Obsidian, a type of volcanic glass.
- Other Amethysts - Former Crystal Gems mentioned by Bismuth.
- Nephrite - A Homeworld ship pilot, mentioned by Bismuth to Pearl.
Many Corrupted Gems are seen trapped in cages in the Beta Kindergarten. Their bodies are hidden by shadows and only their glowing yellow eyes can be seen.
Additionally, Peridot mentions a Carnelian whose hole is misshaped in the Prime Kindergarten, later assumed to be Carnelian, a member of "the Famethyst" in "That Will Be All". Amethyst refers to one Gem with a thin exit hole as "skinny", later assumed to be "Skinny" Jasper, a member of "the Famethyst" who debuted in the same episode as Carnelian.
Another Corrupted Gem can be seen in a cage. Only her two eyes and large six-clawed hand can be seen.
When Steven is adjusting the Roaming Eye's form calibration system for the Crystal Gems, a small type of Gem, possibly Aquamarine, can briefly be seen on the panel, which subsequently alters the Crystal Gems' forms to be small.
Also, a large type of Gem, presumably Quartz, Topaz, or Bismuth can be seen.
A countless number of Rose Quartz gems appear bubbled in a room of Pink Diamond's Zoo.
The defending Zircon states that Pink Diamond's entourage did not contain any Rose Quartzes and was instead composed of several Agates and Sapphires.
Various pieces of old statues can be seen at the beginning of the episode. One appears to be a fusion of two unknown Gems, while the head of a large statue has a gemstone with the same cut as a Rose Quartz's on its forehead.
Rhodonite's components are an unknown Ruby and Pearl, while Fluorite's components are six unknown Gems.
The Rutile Twins mention in that the moment they emerged, the other Rutiles who saw them run away out of fear because of how they looked.
Morganite, an unknown Gem, is mentioned by Rhodonite. She was in charge of the two halves of Rhodonite (a Pearl and a Ruby) before she replaced them after she found out that they had fused.
During Garnet's brief flashback of the Rebellion, two unknown Gem silhouettes appear fighting Pink Diamond alongside Garnet, Pearl, and Bismuth.
- On the left of the image there is a Gem with short hair around the same height of Pearl. She appears to have a thin build. Her hair is similar to the Rutile Twins' or the prosecuting Zircon's.
- On the right of the image there is a short Gem. She resembles one of the unknown Gems in "The Answer".
A group of sixty-seven elite Citrines is mentioned by Emerald to have guarded her fastest ship, the Sun Incinerator, on the docking bay of the planet Klavius 7. Lars and the Off Colors are able to successfully sneak past all of the guards in order to steal the ship. Emerald also mentions that one of the crimes Lars and the Off Colors are accused of impersonating imperial officers in a cosmic jubilee.
In Stevonnie's dream, the name shown on Dr. Maheswaran (who represents Yellow Diamond in the dream)'s phone is Nephrite-XJ Cut-763. She seems to have been reluctant to begin colonizing the planet due to the presence of organic life, causing Yellow Diamond to demand her to do her job, threatening to shatter her and her crew herself otherwise. According to the silhouette on the phone, she has spiky hair.
Yellow Diamond also attempts to contact the leader of the fleet, however, Pink Diamond interrupts her, so the leader's name and appearance are never shown.
During the flashback, many Quartzes belonging to Pink Diamond appeared, emerging from their incubation in the ground alongside Rose Quartz. The silhouettes of other Quartzes, whose purple coloring suggesting they are Amethysts, are also shown working in the kindergarten. Unknown Crystal Gems also appeared in the flashback, standing alongside Rose and fighting unknown Homeworld Gems at the Ancient Sky Arena.
Near the end of the episode, Rhodonite said there will be Agates on one of Yellow Diamond's Asteroid Mines that they were heading towards.
While Steven is in Pearl's gemstone, he discovered her memories of the abandoned Gem Battlefield the second Pearl sent him to. There when he fell, he saw gemstones of inactive Gems in the sand. Later in the scene when Steven comes back from Pearl's gemstone, there are many Gems that witnessed Pink Diamond's shattering. In a following scene, there is a flail-wielding white Gem that Garnet poofs, and a Gem with a sword that Pearl fights.
Three blueish-purple Quartzes (resembling Amethysts) appear in a flashback alongside Pearl, Rose Quartz, and two Topazes. They have large hair covering their eyes and a Blue Diamond insignia on their uniforms.
Ruby mentioned being surrounded by other Rubies before meeting Sapphire.
After Bismuth is unbubbled in the Burning Room, she reveals the names of several bubbled (and presumably corrupted) former Crystal Gems.
- "Tiger's Eye" - A corrupted former Crystal Gem mentioned by Bismuth, currently bubbled in the Burning Room. She is presumably a Quartz.
- "Larimar" - A corrupted former Crystal Gem mentioned by Bismuth (nicknamed "Little Larimar"), currently bubbled in the Burning Room. Her nickname implies that she is of short stature.
- "Beryl" - A corrupted former Crystal Gem mentioned by Bismuth, currently bubbled in the Burning Room.
- "Serpentine" - A corrupted former Crystal Gem mentioned by Bismuth, currently bubbled in the Burning Room.
Upon the arrival of Pink Diamond's ship, many Gems are seen cheering for the Diamonds. Among the Gems seen in the close-up of the crowd are a group of green Gems that resemble Peridots, a group of short pink Gems, a group of pale blue Gems, and a group of flying Aquamarines.
An unknown reddish-pink Gem is shown in the teaser trailer for Steven Universe: The Movie, presumably serving as the film's antagonist. She has her gemstone on her chest.
There are some unknown Gems in Heap of Trouble.
There is an unknown Gem from Steven Universe: Attack the Light.
During a flashback to Hessonite's past, several unknown Gems are seen during the war.
Gems mentioned to be Citrines by Garnet can be heard guarding a door on Hessonite's warship, but they're not seen. The same Citrines believe the sounds they're hearing are the result of a Nephrite drill.
There are some unknown Gems from the Steven Universe comics.
- The unknown Quartz warrior in "Sworn to the Sword" is voiced by Michaela Dietz, implying she may be an Amethyst (or some other type of Quartz).
- The mineral classification of the inactive Crystal Gems are as follows (as mentioned by Bismuth):
- "Crazy Lace" is a variety of agate.
- "Biggs" is a variety of jasper.
- "Tiger’s Eye" is a variety of quartz.
- "Beryl" is a rock type that includes the gems aquamarine, emerald, and morganite.
- "Serpentine" refers to different gems that come from the rock Serpentinite.
- "Larimar" refers to a variety of pectolite.
- "Snowflake" is a type of obsidian.
- "Nephrite" is one of the minerals called jade.
- In Stevonnie's dream in "Jungle Moon", Yellow Diamond (personified by Priyanka Maheswaran) was contacting a Nephrite, specifically Nephrite-XJ Cut-763.
- In "Legs From Here to Homeworld", it is confirmed that the Centipeetle Mother (and presumably her crew) are Nephrites.
- Nephrites were shown to have big, spiky hair and are pilots, as first mentioned by Bismuth in her titular episode: "I'll never forget the look on that Nephrite's face when you pulled her out of the cockpit!"